125415051 has 4 divisors (see below), whose sum is σ = 167220072. Its totient is φ = 83610032.

The previous prime is 125415049. The next prime is 125415071. The reversal of 125415051 is 150514521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 125415051 - 2¹ = 125415049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (125415041) 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 3 ways as a sum of consecutive naturals, for example, 20902506 + ... + 20902511.

It is an arithmetic number, because the mean of its divisors is an integer number (41805018).

Almost surely, 2^125415051 is an apocalyptic number.

125415051 is a deficient number, since it is larger than the sum of its proper divisors (41805021).

125415051 is an equidigital number, since it uses as much as digits as its factorization.

125415051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41805020.

The product of its (nonzero) digits is 1000, while the sum is 24.

The square root of 125415051 is about 11198.8861499705. The cubic root of 125415051 is about 500.5527899546.

Adding to 125415051 its reverse (150514521), we get a palindrome (275929572).

The spelling of 125415051 in words is "one hundred twenty-five million, four hundred fifteen thousand, fifty-one".