421508229 has 4 divisors (see below), whose sum is σ = 562010976. Its totient is φ = 281005484.

The previous prime is 421508221. The next prime is 421508233. The reversal of 421508229 is 922805124.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 421508229 - 2³ = 421508221 is a prime.

It is a super-2 number, since 2×421508229² = 355338374229432882, 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 421508229.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421508221) 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, 70251369 + ... + 70251374.

It is an arithmetic number, because the mean of its divisors is an integer number (140502744).

Almost surely, 2^421508229 is an apocalyptic number.

It is an amenable number.

421508229 is a deficient number, since it is larger than the sum of its proper divisors (140502747).

421508229 is a wasteful number, since it uses less digits than its factorization.

421508229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140502746.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 421508229 is about 20530.6655761570. The cubic root of 421508229 is about 749.7825912062.

The spelling of 421508229 in words is "four hundred twenty-one million, five hundred eight thousand, two hundred twenty-nine".