402955421 has 16 divisors (see below), whose sum is σ = 455414400. Its totient is φ = 353337600.

The previous prime is 402955411. The next prime is 402955433. The reversal of 402955421 is 124559204.

It is not a de Polignac number, because 402955421 - 2¹⁰ = 402954397 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 (402955411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35120 + ... + 45158.

It is an arithmetic number, because the mean of its divisors is an integer number (28463400).

Almost surely, 2^402955421 is an apocalyptic number.

402955421 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

402955421 is a deficient number, since it is larger than the sum of its proper divisors (52458979).

402955421 is a wasteful number, since it uses less digits than its factorization.

402955421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10180.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 402955421 is about 20073.7495500965. The cubic root of 402955421 is about 738.6164927949.

The spelling of 402955421 in words is "four hundred two million, nine hundred fifty-five thousand, four hundred twenty-one".