118425509 has 4 divisors (see below), whose sum is σ = 118449504. Its totient is φ = 118401516.

The previous prime is 118425443. The next prime is 118425521. The reversal of 118425509 is 905524811.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 905524811 = 41 ⋅22085971.

It is a cyclic number.

It is not a de Polignac number, because 118425509 - 2⁸ = 118425253 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 (118425529) 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, 1577 + ... + 15470.

It is an arithmetic number, because the mean of its divisors is an integer number (29612376).

Almost surely, 2^118425509 is an apocalyptic number.

It is an amenable number.

118425509 is a deficient number, since it is larger than the sum of its proper divisors (23995).

118425509 is an equidigital number, since it uses as much as digits as its factorization.

118425509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23994.

The product of its (nonzero) digits is 14400, while the sum is 35.

The square root of 118425509 is about 10882.3485057225. The cubic root of 118425509 is about 491.0756724430.

The spelling of 118425509 in words is "one hundred eighteen million, four hundred twenty-five thousand, five hundred nine".