1056501601 has 4 divisors (see below), whose sum is σ = 1118648772. Its totient is φ = 994354432.

The previous prime is 1056501587. The next prime is 1056501623. The reversal of 1056501601 is 1061056501.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 558140625 + 498360976 = 23625^2 + 22324^2 .

It is a cyclic number.

It is not a de Polignac number, because 1056501601 - 2⁵ = 1056501569 is a prime.

It is a super-2 number, since 2×1056501601² = 2232391265831126402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1056501671) 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, 31073560 + ... + 31073593.

It is an arithmetic number, because the mean of its divisors is an integer number (279662193).

Almost surely, 2^1056501601 is an apocalyptic number.

It is an amenable number.

1056501601 is a deficient number, since it is larger than the sum of its proper divisors (62147171).

1056501601 is an equidigital number, since it uses as much as digits as its factorization.

1056501601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62147170.

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 1056501601 is about 32503.8705541355. The cubic root of 1056501601 is about 1018.4898841044.

The spelling of 1056501601 in words is "one billion, fifty-six million, five hundred one thousand, six hundred one".