125641551 has 8 divisors (see below), whose sum is σ = 191453824. Its totient is φ = 71795160.

The previous prime is 125641511. The next prime is 125641553. The reversal of 125641551 is 155146521.

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

It is not a de Polignac number, because 125641551 - 2⁹ = 125641039 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 (125641553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2991445 + ... + 2991486.

It is an arithmetic number, because the mean of its divisors is an integer number (23931728).

Almost surely, 2^125641551 is an apocalyptic number.

125641551 is a deficient number, since it is larger than the sum of its proper divisors (65812273).

125641551 is an equidigital number, since it uses as much as digits as its factorization.

125641551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5982941.

The product of its digits is 6000, while the sum is 30.

The square root of 125641551 is about 11208.9942010869. The cubic root of 125641551 is about 500.8539420689.

The spelling of 125641551 in words is "one hundred twenty-five million, six hundred forty-one thousand, five hundred fifty-one".