125489451 has 4 divisors (see below), whose sum is σ = 167319272. Its totient is φ = 83659632.

The previous prime is 125489431. The next prime is 125489453. The reversal of 125489451 is 154984521.

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

It is not a de Polignac number, because 125489451 - 2⁶ = 125489387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125489453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20914906 + ... + 20914911.

It is an arithmetic number, because the mean of its divisors is an integer number (41829818).

Almost surely, 2^125489451 is an apocalyptic number.

125489451 is a deficient number, since it is larger than the sum of its proper divisors (41829821).

125489451 is an equidigital number, since it uses as much as digits as its factorization.

125489451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41829820.

The product of its digits is 57600, while the sum is 39.

The square root of 125489451 is about 11202.2074163979. The cubic root of 125489451 is about 500.6517514044.

The spelling of 125489451 in words is "one hundred twenty-five million, four hundred eighty-nine thousand, four hundred fifty-one".