1125721174400 has 48 divisors (see below), whose sum is σ = 2780883096540. Its totient is φ = 450288468480.

The previous prime is 1125721174367. The next prime is 1125721174429. The reversal of 1125721174400 is 44711275211.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 175890734 + ... + 175897133.

Almost surely, 2^{1125721174400} is an apocalyptic number.

1125721174400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1125721174400 is an abundant number, since it is smaller than the sum of its proper divisors (1655161922140).

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

1125721174400 is an equidigital number, since it uses as much as digits as its factorization.

1125721174400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351787891 (or 351787874 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 35.

The spelling of 1125721174400 in words is "one trillion, one hundred twenty-five billion, seven hundred twenty-one million, one hundred seventy-four thousand, four hundred".