1011570457 has 4 divisors (see below), whose sum is σ = 1011635380. Its totient is φ = 1011505536.

The previous prime is 1011570451. The next prime is 1011570479. The reversal of 1011570457 is 7540751101.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 652240521 + 359329936 = 25539^2 + 18956^2 .

It is a 3-Lehmer number, since φ(1011570457) divides (1011570457-1)³.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1011570457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1011570451) 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, 6493 + ... + 45445.

It is an arithmetic number, because the mean of its divisors is an integer number (252908845).

It is a Poulet number, since it divides 2^1011570456-1.

Almost surely, 2^1011570457 is an apocalyptic number.

1011570457 is the 25969-th pentagonal number.

It is an amenable number.

1011570457 is a deficient number, since it is larger than the sum of its proper divisors (64923).

1011570457 is an equidigital number, since it uses as much as digits as its factorization.

1011570457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64922.

The product of its (nonzero) digits is 4900, while the sum is 31.

The square root of 1011570457 is about 31805.1954403679. The cubic root of 1011570457 is about 1003.8420388332.

The spelling of 1011570457 in words is "one billion, eleven million, five hundred seventy thousand, four hundred fifty-seven".