125121451 has 24 divisors (see below), whose sum is σ = 158578560. Its totient is φ = 97840512.

The previous prime is 125121439. The next prime is 125121467. The reversal of 125121451 is 154121521.

It is not a de Polignac number, because 125121451 - 2⁵ = 125121419 is a prime.

It is not an unprimeable number, because it can be changed into a prime (125121481) 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 23 ways as a sum of consecutive naturals, for example, 55590 + ... + 57796.

It is an arithmetic number, because the mean of its divisors is an integer number (6607440).

Almost surely, 2^125121451 is an apocalyptic number.

125121451 is a deficient number, since it is larger than the sum of its proper divisors (33457109).

125121451 is a wasteful number, since it uses less digits than its factorization.

125121451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2323 (or 2316 counting only the distinct ones).

The product of its digits is 400, while the sum is 22.

The square root of 125121451 is about 11185.7700226672. The cubic root of 125121451 is about 500.1618822493.

Adding to 125121451 its reverse (154121521), we get a palindrome (279242972).

The spelling of 125121451 in words is "one hundred twenty-five million, one hundred twenty-one thousand, four hundred fifty-one".