421902429 has 16 divisors (see below), whose sum is σ = 637694400. Its totient is φ = 245966976.

The previous prime is 421902407. The next prime is 421902461. The reversal of 421902429 is 924209124.

It is not a de Polignac number, because 421902429 - 2⁹ = 421901917 is a prime.

It is a super-2 number, since 2×421902429² = 356003319192200082, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 421902429.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421902479) 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, 283944 + ... + 285425.

It is an arithmetic number, because the mean of its divisors is an integer number (39855900).

Almost surely, 2^421902429 is an apocalyptic number.

It is an amenable number.

421902429 is a deficient number, since it is larger than the sum of its proper divisors (215791971).

421902429 is a wasteful number, since it uses less digits than its factorization.

421902429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 569404.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 421902429 is about 20540.2636059034. The cubic root of 421902429 is about 750.0162538700.

The spelling of 421902429 in words is "four hundred twenty-one million, nine hundred two thousand, four hundred twenty-nine".