1251313257010 has 16 divisors (see below), whose sum is σ = 2254596154200. Its totient is φ = 500029238016.

The previous prime is 1251313256981. The next prime is 1251313257049. The reversal of 1251313257010 is 107523131521.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1145839652721 + 105473604289 = 1070439^2 + 324767^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61997505 + ... + 62017684.

Almost surely, 2^{1251313257010} is an apocalyptic number.

1251313257010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1251313257010 is a deficient number, since it is larger than the sum of its proper divisors (1003282897190).

1251313257010 is a wasteful number, since it uses less digits than its factorization.

1251313257010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124016205.

The product of its (nonzero) digits is 6300, while the sum is 31.

Adding to 1251313257010 its reverse (107523131521), we get a palindrome (1358836388531).

The spelling of 1251313257010 in words is "one trillion, two hundred fifty-one billion, three hundred thirteen million, two hundred fifty-seven thousand, ten".