125620551 has 56 divisors (see below), whose sum is σ = 218250240. Its totient is φ = 70788816.

The previous prime is 125620543. The next prime is 125620577. The reversal of 125620551 is 155026521.

It is not a de Polignac number, because 125620551 - 2³ = 125620543 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125620591) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 525490 + ... + 525728.

Almost surely, 2^125620551 is an apocalyptic number.

125620551 is a deficient number, since it is larger than the sum of its proper divisors (92629689).

125620551 is an equidigital number, since it uses as much as digits as its factorization.

125620551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367 (or 352 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The square root of 125620551 is about 11208.0574141998. The cubic root of 125620551 is about 500.8260359112.

The spelling of 125620551 in words is "one hundred twenty-five million, six hundred twenty thousand, five hundred fifty-one".