1056601591 has 8 divisors (see below), whose sum is σ = 1080566784. Its totient is φ = 1032877560.

The previous prime is 1056601589. The next prime is 1056601607. The reversal of 1056601591 is 1951066501.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1056601591 - 2¹ = 1056601589 is a prime.

It is a super-2 number, since 2×1056601591² = 2232813844207462562, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1056601541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51415 + ... + 68968.

It is an arithmetic number, because the mean of its divisors is an integer number (135070848).

Almost surely, 2^1056601591 is an apocalyptic number.

1056601591 is a deficient number, since it is larger than the sum of its proper divisors (23965193).

1056601591 is a wasteful number, since it uses less digits than its factorization.

1056601591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120581.

The product of its (nonzero) digits is 8100, while the sum is 34.

The square root of 1056601591 is about 32505.4086422552. The cubic root of 1056601591 is about 1018.5220139156.

The spelling of 1056601591 in words is "one billion, fifty-six million, six hundred one thousand, five hundred ninety-one".