125324382156521 has 4 divisors (see below), whose sum is σ = 125592742718352. Its totient is φ = 125056021594692.

The previous prime is 125324382156511. The next prime is 125324382156527. The reversal of 125324382156521 is 125651283423521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 125324382156521 - 2¹⁴ = 125324382140137 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 125324382156521.

It is not an unprimeable number, because it can be changed into a prime (125324382156527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134180280215 + ... + 134180281148.

It is an arithmetic number, because the mean of its divisors is an integer number (31398185679588).

Almost surely, 2^{125324382156521} is an apocalyptic number.

It is an amenable number.

125324382156521 is a deficient number, since it is larger than the sum of its proper divisors (268360561831).

125324382156521 is an equidigital number, since it uses as much as digits as its factorization.

125324382156521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268360561830.

The product of its digits is 3456000, while the sum is 50.

The spelling of 125324382156521 in words is "one hundred twenty-five trillion, three hundred twenty-four billion, three hundred eighty-two million, one hundred fifty-six thousand, five hundred twenty-one".