1056621617 has 16 divisors (see below), whose sum is σ = 1120884480. Its totient is φ = 994739328.

The previous prime is 1056621589. The next prime is 1056621647. The reversal of 1056621617 is 7161266501.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1056621617 is a prime.

It is a super-2 number, since 2×1056621617² = 2232898483023389378, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1056621647) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 151358 + ... + 158184.

It is an arithmetic number, because the mean of its divisors is an integer number (70055280).

Almost surely, 2^1056621617 is an apocalyptic number.

It is an amenable number.

1056621617 is a deficient number, since it is larger than the sum of its proper divisors (64262863).

1056621617 is an equidigital number, since it uses as much as digits as its factorization.

1056621617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7000.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 1056621617 is about 32505.7166818392. The cubic root of 1056621617 is about 1018.5284486315.

The spelling of 1056621617 in words is "one billion, fifty-six million, six hundred twenty-one thousand, six hundred seventeen".