1072205857 has 2 divisors, whose sum is σ = 1072205858. Its totient is φ = 1072205856.

The previous prime is 1072205839. The next prime is 1072205887. The reversal of 1072205857 is 7585022701.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1062694801 + 9511056 = 32599^2 + 3084^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1072205857 is a prime.

It is a super-2 number, since 2×1072205857² = 2299250799570208898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1072205837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 536102928 + 536102929.

It is an arithmetic number, because the mean of its divisors is an integer number (536102929).

Almost surely, 2^1072205857 is an apocalyptic number.

It is an amenable number.

1072205857 is a deficient number, since it is larger than the sum of its proper divisors (1).

1072205857 is an equidigital number, since it uses as much as digits as its factorization.

1072205857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 39200, while the sum is 37.

The square root of 1072205857 is about 32744.5546159968. The cubic root of 1072205857 is about 1023.5114962346.

The spelling of 1072205857 in words is "one billion, seventy-two million, two hundred five thousand, eight hundred fifty-seven".