116172421 has 4 divisors (see below), whose sum is σ = 116395072. Its totient is φ = 115949772.

The previous prime is 116172409. The next prime is 116172431. The reversal of 116172421 is 124271611.

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 a de Polignac number, because none of the positive numbers 2^k-116172421 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 (116172431) 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, 110541 + ... + 111586.

It is an arithmetic number, because the mean of its divisors is an integer number (29098768).

Almost surely, 2^116172421 is an apocalyptic number.

It is an amenable number.

116172421 is a deficient number, since it is larger than the sum of its proper divisors (222651).

116172421 is an equidigital number, since it uses as much as digits as its factorization.

116172421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222650.

The product of its digits is 672, while the sum is 25.

The square root of 116172421 is about 10778.3310860263. The cubic root of 116172421 is about 487.9414135638.

The spelling of 116172421 in words is "one hundred sixteen million, one hundred seventy-two thousand, four hundred twenty-one".