1257156050 has 24 divisors (see below), whose sum is σ = 2339324976. Its totient is φ = 502644240.

The previous prime is 1257156029. The next prime is 1257156059. The reversal of 1257156050 is 506517521.

It is a junction number, because it is equal to n+sod(n) for n = 1257155998 and 1257156016.

It is not an unprimeable number, because it can be changed into a prime (1257156059) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 161549 + ... + 169151.

It is an arithmetic number, because the mean of its divisors is an integer number (97471874).

Almost surely, 2^1257156050 is an apocalyptic number.

1257156050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1257156050 is a deficient number, since it is larger than the sum of its proper divisors (1082168926).

1257156050 is a wasteful number, since it uses less digits than its factorization.

1257156050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10922 (or 10917 counting only the distinct ones).

The product of its (nonzero) digits is 10500, while the sum is 32.

The square root of 1257156050 is about 35456.3964610055. The cubic root of 1257156050 is about 1079.2690670377.

The spelling of 1257156050 in words is "one billion, two hundred fifty-seven million, one hundred fifty-six thousand, fifty".