125117551 has 8 divisors (see below), whose sum is σ = 134893584. Its totient is φ = 115363200.

The previous prime is 125117537. The next prime is 125117563. The reversal of 125117551 is 155711521.

125117551 = 4564² + 4565² + ... + 4569².

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 125117551 - 2⁷ = 125117423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125117051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7776 + ... + 17626.

It is an arithmetic number, because the mean of its divisors is an integer number (16861698).

Almost surely, 2^125117551 is an apocalyptic number.

125117551 is a deficient number, since it is larger than the sum of its proper divisors (9776033).

125117551 is an equidigital number, since it uses as much as digits as its factorization.

125117551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10841.

The product of its digits is 1750, while the sum is 28.

The square root of 125117551 is about 11185.5956926755. The cubic root of 125117551 is about 500.1566855608.

The spelling of 125117551 in words is "one hundred twenty-five million, one hundred seventeen thousand, five hundred fifty-one".