125430435002521 has 4 divisors (see below), whose sum is σ = 136833201820944. Its totient is φ = 114027668184100.

The previous prime is 125430435002519. The next prime is 125430435002633. The reversal of 125430435002521 is 125200534034521.

It is a happy number.

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 not a de Polignac number, because 125430435002521 - 2¹ = 125430435002519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125430435002501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5701383409195 + ... + 5701383409216.

It is an arithmetic number, because the mean of its divisors is an integer number (34208300455236).

Almost surely, 2^{125430435002521} is an apocalyptic number.

125430435002521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

125430435002521 is a deficient number, since it is larger than the sum of its proper divisors (11402766818423).

125430435002521 is a wasteful number, since it uses less digits than its factorization.

125430435002521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11402766818422.

The product of its (nonzero) digits is 144000, while the sum is 37.

The spelling of 125430435002521 in words is "one hundred twenty-five trillion, four hundred thirty billion, four hundred thirty-five million, two thousand, five hundred twenty-one".