172421367 has 4 divisors (see below), whose sum is σ = 229895160. Its totient is φ = 114947576.

The previous prime is 172421329. The next prime is 172421383. The reversal of 172421367 is 763124271.

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 172421367 - 2⁸ = 172421111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172421387) 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, 28736892 + ... + 28736897.

It is an arithmetic number, because the mean of its divisors is an integer number (57473790).

Almost surely, 2^172421367 is an apocalyptic number.

172421367 is a deficient number, since it is larger than the sum of its proper divisors (57473793).

172421367 is an equidigital number, since it uses as much as digits as its factorization.

172421367 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57473792.

The product of its digits is 14112, while the sum is 33.

The square root of 172421367 is about 13130.9316881933. The cubic root of 172421367 is about 556.5835433909.

The spelling of 172421367 in words is "one hundred seventy-two million, four hundred twenty-one thousand, three hundred sixty-seven".