125409118 has 4 divisors (see below), whose sum is σ = 188113680. Its totient is φ = 62704558.

The previous prime is 125409091. The next prime is 125409121. The reversal of 125409118 is 811904521.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 125409118.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31352278 + ... + 31352281.

It is an arithmetic number, because the mean of its divisors is an integer number (47028420).

Almost surely, 2^125409118 is an apocalyptic number.

125409118 is a deficient number, since it is larger than the sum of its proper divisors (62704562).

125409118 is an equidigital number, since it uses as much as digits as its factorization.

125409118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62704561.

The product of its (nonzero) digits is 2880, while the sum is 31.

The square root of 125409118 is about 11198.6212544223. The cubic root of 125409118 is about 500.5448966263.

The spelling of 125409118 in words is "one hundred twenty-five million, four hundred nine thousand, one hundred eighteen".