118407421 has 4 divisors (see below), whose sum is σ = 129171744. Its totient is φ = 107643100.

The previous prime is 118407413. The next prime is 118407433. The reversal of 118407421 is 124704811.

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.

It is a cyclic number.

It is not a de Polignac number, because 118407421 - 2³ = 118407413 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 118407421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118407521) 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, 5382145 + ... + 5382166.

It is an arithmetic number, because the mean of its divisors is an integer number (32292936).

Almost surely, 2^118407421 is an apocalyptic number.

118407421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

118407421 is a deficient number, since it is larger than the sum of its proper divisors (10764323).

118407421 is a wasteful number, since it uses less digits than its factorization.

118407421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10764322.

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 118407421 is about 10881.5174033772. The cubic root of 118407421 is about 491.0506693022.

It can be divided in two parts, 118407 and 421, that added together give a triangular number (118828 = T₄₈₇).

The spelling of 118407421 in words is "one hundred eighteen million, four hundred seven thousand, four hundred twenty-one".