1156870645 has 24 divisors (see below), whose sum is σ = 1625643648. Its totient is φ = 788004000.

The previous prime is 1156870579. The next prime is 1156870661. The reversal of 1156870645 is 5460786511.

It is not a de Polignac number, because 1156870645 - 2¹¹ = 1156868597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21360 + ... + 52630.

It is an arithmetic number, because the mean of its divisors is an integer number (67735152).

Almost surely, 2^1156870645 is an apocalyptic number.

It is an amenable number.

1156870645 is a deficient number, since it is larger than the sum of its proper divisors (468773003).

1156870645 is a wasteful number, since it uses less digits than its factorization.

1156870645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31441 (or 31434 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 43.

The square root of 1156870645 is about 34012.8011930802. The cubic root of 1156870645 is about 1049.7718763672.

The spelling of 1156870645 in words is "one billion, one hundred fifty-six million, eight hundred seventy thousand, six hundred forty-five".