402921955 has 4 divisors (see below), whose sum is σ = 483506352. Its totient is φ = 322337560.

The previous prime is 402921943. The next prime is 402921977. The reversal of 402921955 is 559129204.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 402921955 - 2¹⁵ = 402889187 is a prime.

It is a super-2 number, since 2×402921955² = 324692203642044050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 40292191 + ... + 40292200.

It is an arithmetic number, because the mean of its divisors is an integer number (120876588).

Almost surely, 2^402921955 is an apocalyptic number.

402921955 is a deficient number, since it is larger than the sum of its proper divisors (80584397).

402921955 is an equidigital number, since it uses as much as digits as its factorization.

402921955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80584396.

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 402921955 is about 20072.9159565819. The cubic root of 402921955 is about 738.5960445248.

The spelling of 402921955 in words is "four hundred two million, nine hundred twenty-one thousand, nine hundred fifty-five".