125402354554421 has 64 divisors (see below), whose sum is σ = 152933416796160. Its totient is φ = 100560167608320.

The previous prime is 125402354554409. The next prime is 125402354554439. The reversal of 125402354554421 is 124455453204521.

It is a de Polignac number, because none of the positive numbers 2^k-125402354554421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125402354554121) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1815470141 + ... + 1815539213.

It is an arithmetic number, because the mean of its divisors is an integer number (2389584637440).

Almost surely, 2^{125402354554421} is an apocalyptic number.

It is an amenable number.

125402354554421 is a deficient number, since it is larger than the sum of its proper divisors (27531062241739).

125402354554421 is a wasteful number, since it uses less digits than its factorization.

125402354554421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71146.

The product of its (nonzero) digits is 3840000, while the sum is 47.

The spelling of 125402354554421 in words is "one hundred twenty-five trillion, four hundred two billion, three hundred fifty-four million, five hundred fifty-four thousand, four hundred twenty-one".