125081599 has 4 divisors (see below), whose sum is σ = 125397064. Its totient is φ = 124766136.

The previous prime is 125081587. The next prime is 125081633. The reversal of 125081599 is 995180521.

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

It is a cyclic number.

It is not a de Polignac number, because 125081599 - 2⁷ = 125081471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125081519) 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, 157137 + ... + 157930.

It is an arithmetic number, because the mean of its divisors is an integer number (31349266).

Almost surely, 2^125081599 is an apocalyptic number.

125081599 is a deficient number, since it is larger than the sum of its proper divisors (315465).

125081599 is an equidigital number, since it uses as much as digits as its factorization.

125081599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315464.

The product of its (nonzero) digits is 32400, while the sum is 40.

The square root of 125081599 is about 11183.9885103661. The cubic root of 125081599 is about 500.1087750009.

The spelling of 125081599 in words is "one hundred twenty-five million, eighty-one thousand, five hundred ninety-nine".