402172415 has 4 divisors (see below), whose sum is σ = 482606904. Its totient is φ = 321737928.

The previous prime is 402172409. The next prime is 402172423. The reversal of 402172415 is 514271204.

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 402172415 - 2²⁸ = 133736959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40217237 + ... + 40217246.

It is an arithmetic number, because the mean of its divisors is an integer number (120651726).

Almost surely, 2^402172415 is an apocalyptic number.

402172415 is a deficient number, since it is larger than the sum of its proper divisors (80434489).

402172415 is an equidigital number, since it uses as much as digits as its factorization.

402172415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80434488.

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 402172415 is about 20054.2368341455. The cubic root of 402172415 is about 738.1377664288.

The spelling of 402172415 in words is "four hundred two million, one hundred seventy-two thousand, four hundred fifteen".