1251453706474 has 4 divisors (see below), whose sum is σ = 1877180559714. Its totient is φ = 625726853236.

The previous prime is 1251453706427. The next prime is 1251453706501. The reversal of 1251453706474 is 4746073541521.

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., 1164549614449 + 86904092025 = 1079143^2 + 294795^2 .

It is a super-2 number, since 2×1251453706474² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312863426617 + ... + 312863426620.

Almost surely, 2^{1251453706474} is an apocalyptic number.

1251453706474 is a deficient number, since it is larger than the sum of its proper divisors (625726853240).

1251453706474 is an equidigital number, since it uses as much as digits as its factorization.

1251453706474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 625726853239.

The product of its (nonzero) digits is 2822400, while the sum is 49.

The spelling of 1251453706474 in words is "one trillion, two hundred fifty-one billion, four hundred fifty-three million, seven hundred six thousand, four hundred seventy-four".