118138401 has 24 divisors (see below), whose sum is σ = 174979584. Its totient is φ = 76772160.

The previous prime is 118138399. The next prime is 118138403. The reversal of 118138401 is 104831811.

It is an interprime number because it is at equal distance from previous prime (118138399) and next prime (118138403).

It is not a de Polignac number, because 118138401 - 2¹ = 118138399 is a prime.

It is not an unprimeable number, because it can be changed into a prime (118138403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 154861 + ... + 155621.

It is an arithmetic number, because the mean of its divisors is an integer number (7290816).

Almost surely, 2^118138401 is an apocalyptic number.

It is an amenable number.

118138401 is a deficient number, since it is larger than the sum of its proper divisors (56841183).

118138401 is a wasteful number, since it uses less digits than its factorization.

118138401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1181 (or 1178 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 27.

The square root of 118138401 is about 10869.1490467285. The cubic root of 118138401 is about 490.6785005609.

The spelling of 118138401 in words is "one hundred eighteen million, one hundred thirty-eight thousand, four hundred one".