1156342005 has 96 divisors (see below), whose sum is σ = 2546718720. Its totient is φ = 472158720.

The previous prime is 1156341959. The next prime is 1156342013. The reversal of 1156342005 is 5002436511.

1156342005 is a `hidden beast` number, since 1 + 1 + 5 + 634 + 20 + 0 + 5 = 666.

It is not a de Polignac number, because 1156342005 - 2⁶ = 1156341941 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1156342005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 122391 + ... + 131499.

It is an arithmetic number, because the mean of its divisors is an integer number (26528320).

Almost surely, 2^1156342005 is an apocalyptic number.

1156342005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1156342005 is an abundant number, since it is smaller than the sum of its proper divisors (1390376715).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1156342005 is a wasteful number, since it uses less digits than its factorization.

1156342005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9171 (or 9168 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 1156342005 is about 34005.0291133532. The cubic root of 1156342005 is about 1049.6119518449.

Adding to 1156342005 its reverse (5002436511), we get a palindrome (6158778516).

The spelling of 1156342005 in words is "one billion, one hundred fifty-six million, three hundred forty-two thousand, five".