1238312057 has 4 divisors (see below), whose sum is σ = 1238383476. Its totient is φ = 1238240640.

The previous prime is 1238312051. The next prime is 1238312077. The reversal of 1238312057 is 7502138321.

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 881139856 + 357172201 = 29684^2 + 18899^2 .

It is a cyclic number.

It is not a de Polignac number, because 1238312057 - 2⁶ = 1238311993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1238312051) 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, 8753 + ... + 50529.

It is an arithmetic number, because the mean of its divisors is an integer number (309595869).

Almost surely, 2^1238312057 is an apocalyptic number.

It is an amenable number.

1238312057 is a deficient number, since it is larger than the sum of its proper divisors (71419).

1238312057 is an equidigital number, since it uses as much as digits as its factorization.

1238312057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71418.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 1238312057 is about 35189.6583814052. The cubic root of 1238312057 is about 1073.8493712048.

The spelling of 1238312057 in words is "one billion, two hundred thirty-eight million, three hundred twelve thousand, fifty-seven".