125438655 has 16 divisors (see below), whose sum is σ = 201715200. Its totient is φ = 66562848.

The previous prime is 125438641. The next prime is 125438669. The reversal of 125438655 is 556834521.

It is an interprime number because it is at equal distance from previous prime (125438641) and next prime (125438669).

It is not a de Polignac number, because 125438655 - 2¹¹ = 125436607 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 18027 + ... + 23996.

It is an arithmetic number, because the mean of its divisors is an integer number (12607200).

Almost surely, 2^125438655 is an apocalyptic number.

125438655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

125438655 is a deficient number, since it is larger than the sum of its proper divisors (76276545).

125438655 is a wasteful number, since it uses less digits than its factorization.

125438655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42230.

The product of its digits is 144000, while the sum is 39.

The square root of 125438655 is about 11199.9399551962. The cubic root of 125438655 is about 500.5841905104.

The spelling of 125438655 in words is "one hundred twenty-five million, four hundred thirty-eight thousand, six hundred fifty-five".