1056752639 has 4 divisors (see below), whose sum is σ = 1057248360. Its totient is φ = 1056256920.

The previous prime is 1056752617. The next prime is 1056752647. The reversal of 1056752639 is 9362576501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9362576501 = 4817 ⋅1943653.

It is a cyclic number.

It is not a de Polignac number, because 1056752639 - 2¹⁶ = 1056687103 is a prime.

It is a super-2 number, since 2×1056752639² = 2233452280066928642, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1056752639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1056752239) 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 3 ways as a sum of consecutive naturals, for example, 244649 + ... + 248930.

It is an arithmetic number, because the mean of its divisors is an integer number (264312090).

Almost surely, 2^1056752639 is an apocalyptic number.

1056752639 is a deficient number, since it is larger than the sum of its proper divisors (495721).

1056752639 is an equidigital number, since it uses as much as digits as its factorization.

1056752639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495720.

The product of its (nonzero) digits is 340200, while the sum is 44.

The square root of 1056752639 is about 32507.7319879440. The cubic root of 1056752639 is about 1018.5705463628.

The spelling of 1056752639 in words is "one billion, fifty-six million, seven hundred fifty-two thousand, six hundred thirty-nine".