125555555 has 8 divisors (see below), whose sum is σ = 150764544. Its totient is φ = 100379200.

The previous prime is 125555531. The next prime is 125555567. The reversal of 125555555 is 555555521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 125555555 - 2⁶ = 125555491 is a prime.

It is a Duffinian number.

125555555 is a modest number, since divided by 55555 gives 1255 as remainder.

It is a plaindrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1310 + ... + 15900.

It is an arithmetic number, because the mean of its divisors is an integer number (18845568).

Almost surely, 2^125555555 is an apocalyptic number.

125555555 is a deficient number, since it is larger than the sum of its proper divisors (25208989).

125555555 is a wasteful number, since it uses less digits than its factorization.

125555555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16317.

The product of its digits is 156250, while the sum is 38.

The square root of 125555555 is about 11205.1575178576. The cubic root of 125555555 is about 500.7396453101.

The spelling of 125555555 in words is "one hundred twenty-five million, five hundred fifty-five thousand, five hundred fifty-five".