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1156000001 = 132916131901
BaseRepresentation
bin100010011100111…
…0010100100000001
32222120012212212212
41010321302210001
54331414000001
6310413031505
740434560252
oct10471624401
92876185785
101156000001
11543593a02
12283185595
1315565a090
14ad758b29
156b7487bb
hex44e72901

1156000001 has 16 divisors (see below), whose sum is σ = 1289327760. Its totient is φ = 1029100800.

The previous prime is 1155999989. The next prime is 1156000037. The reversal of 1156000001 is 1000006511.

It is a Cunningham number, because it is equal to 340002+1.

It can be written as a sum of positive squares in 8 ways, for example, as 148254976 + 1007745025 = 12176^2 + 31745^2 .

It is not a de Polignac number, because 1156000001 - 226 = 1088891137 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1156000001.

It is not an unprimeable number, because it can be changed into a prime (1156000801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 607151 + ... + 609051.

It is an arithmetic number, because the mean of its divisors is an integer number (80582985).

Almost surely, 21156000001 is an apocalyptic number.

It is an amenable number.

1156000001 is a deficient number, since it is larger than the sum of its proper divisors (133327759).

1156000001 is a wasteful number, since it uses less digits than its factorization.

1156000001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3556.

The product of its (nonzero) digits is 30, while the sum is 14.

The square root of 1156000001 is about 34000.0000147059. Note that the first 4 decimals coincide. The cubic root of 1156000001 is about 1049.5084626003.

Adding to 1156000001 its reverse (1000006511), we get a palindrome (2156006512).

The spelling of 1156000001 in words is "one billion, one hundred fifty-six million, one", and thus it is an aban number.

Divisors: 1 13 29 377 1613 1901 20969 24713 46777 55129 608101 716677 3066313 39862069 88923077 1156000001