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1305601 = 11118691
BaseRepresentation
bin100111110110000000001
32110022221121
410332300001
5313234401
643552241
714045263
oct4766001
92408847
101305601
11811a10
1252b681
1336935b
1425db33
151abca1
hex13ec01

1305601 has 4 divisors (see below), whose sum is σ = 1424304. Its totient is φ = 1186900.

The previous prime is 1305599. The next prime is 1305607. The reversal of 1305601 is 1065031.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1065031 = 1196821.

It is not a de Polignac number, because 1305601 - 21 = 1305599 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1305607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59335 + ... + 59356.

It is an arithmetic number, because the mean of its divisors is an integer number (356076).

21305601 is an apocalyptic number.

1305601 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1305601 is a deficient number, since it is larger than the sum of its proper divisors (118703).

1305601 is a wasteful number, since it uses less digits than its factorization.

1305601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118702.

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 1305601 is about 1142.6289861543. The cubic root of 1305601 is about 109.2958045481.

The spelling of 1305601 in words is "one million, three hundred five thousand, six hundred one".

Divisors: 1 11 118691 1305601