125744342521 has 16 divisors (see below), whose sum is σ = 153146548224. Its totient is φ = 100901229264.

The previous prime is 125744342501. The next prime is 125744342653. The reversal of 125744342521 is 125243447521.

It is not a de Polignac number, because 125744342521 - 2¹³ = 125744334329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125744342501) 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, 8301165 + ... + 8316298.

It is an arithmetic number, because the mean of its divisors is an integer number (9571659264).

Almost surely, 2^125744342521 is an apocalyptic number.

It is an amenable number.

125744342521 is a deficient number, since it is larger than the sum of its proper divisors (27402205703).

125744342521 is a wasteful number, since it uses less digits than its factorization.

125744342521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16617540.

The product of its digits is 268800, while the sum is 40.

The spelling of 125744342521 in words is "one hundred twenty-five billion, seven hundred forty-four million, three hundred forty-two thousand, five hundred twenty-one".