1157066431 has 4 divisors (see below), whose sum is σ = 1157134552. Its totient is φ = 1156998312.

The previous prime is 1157066419. The next prime is 1157066473. The reversal of 1157066431 is 1346607511.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1346607511 = 22073 ⋅61007.

It is a cyclic number.

It is not a de Polignac number, because 1157066431 - 2⁷ = 1157066303 is a prime.

It is a super-2 number, since 2×1157066431² = 2677605451494155522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1157066411) 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, 14425 + ... + 50221.

It is an arithmetic number, because the mean of its divisors is an integer number (289283638).

Almost surely, 2^1157066431 is an apocalyptic number.

1157066431 is a deficient number, since it is larger than the sum of its proper divisors (68121).

1157066431 is an equidigital number, since it uses as much as digits as its factorization.

1157066431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68120.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 1157066431 is about 34015.6791935719. The cubic root of 1157066431 is about 1049.8310933143.

The spelling of 1157066431 in words is "one billion, one hundred fifty-seven million, sixty-six thousand, four hundred thirty-one".