1257457439162 has 4 divisors (see below), whose sum is σ = 1886186158746. Its totient is φ = 628728719580.

The previous prime is 1257457439057. The next prime is 1257457439191. The reversal of 1257457439162 is 2619347547521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1172280432961 + 85177006201 = 1082719^2 + 291851^2 .

It is a super-2 number, since 2×1257457439162² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1257457439098 and 1257457439107.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314364359789 + ... + 314364359792.

Almost surely, 2^{1257457439162} is an apocalyptic number.

1257457439162 is a deficient number, since it is larger than the sum of its proper divisors (628728719584).

1257457439162 is an equidigital number, since it uses as much as digits as its factorization.

1257457439162 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 628728719583.

The product of its digits is 12700800, while the sum is 56.

The spelling of 1257457439162 in words is "one trillion, two hundred fifty-seven billion, four hundred fifty-seven million, four hundred thirty-nine thousand, one hundred sixty-two".