125744072421 has 16 divisors (see below), whose sum is σ = 183067859520. Its totient is φ = 76138782720.

The previous prime is 125744072407. The next prime is 125744072453. The reversal of 125744072421 is 124270447521.

It is not a de Polignac number, because 125744072421 - 2³⁰ = 124670330597 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 125744072421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125744072491) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1707036 + ... + 1779173.

It is an arithmetic number, because the mean of its divisors is an integer number (11441741220).

Almost surely, 2^125744072421 is an apocalyptic number.

125744072421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

125744072421 is a deficient number, since it is larger than the sum of its proper divisors (57323787099).

125744072421 is a wasteful number, since it uses less digits than its factorization.

125744072421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3487316.

The product of its (nonzero) digits is 125440, while the sum is 39.

The spelling of 125744072421 in words is "one hundred twenty-five billion, seven hundred forty-four million, seventy-two thousand, four hundred twenty-one".