125278451 has 4 divisors (see below), whose sum is σ = 125639832. Its totient is φ = 124917072.

The previous prime is 125278429. The next prime is 125278477. The reversal of 125278451 is 154872521.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125278451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125278421) 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, 180170 + ... + 180863.

It is an arithmetic number, because the mean of its divisors is an integer number (31409958).

Almost surely, 2^125278451 is an apocalyptic number.

125278451 is a deficient number, since it is larger than the sum of its proper divisors (361381).

125278451 is an equidigital number, since it uses as much as digits as its factorization.

125278451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361380.

The product of its digits is 22400, while the sum is 35.

The square root of 125278451 is about 11192.7856675628. The cubic root of 125278451 is about 500.3709926608.

The spelling of 125278451 in words is "one hundred twenty-five million, two hundred seventy-eight thousand, four hundred fifty-one".