1251445245402 has 16 divisors (see below), whose sum is σ = 2730425990112. Its totient is φ = 379225831920.

The previous prime is 1251445245331. The next prime is 1251445245419. The reversal of 1251445245402 is 2045425441521.

It is a super-2 number, since 2×1251445245402² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9480645733 + ... + 9480645864.

It is an arithmetic number, because the mean of its divisors is an integer number (170651624382).

Almost surely, 2^{1251445245402} is an apocalyptic number.

1251445245402 is an abundant number, since it is smaller than the sum of its proper divisors (1478980744710).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1251445245402 is a wasteful number, since it uses less digits than its factorization.

1251445245402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18961291613.

The product of its (nonzero) digits is 256000, while the sum is 39.

The spelling of 1251445245402 in words is "one trillion, two hundred fifty-one billion, four hundred forty-five million, two hundred forty-five thousand, four hundred two".