421229289 has 12 divisors (see below), whose sum is σ = 608166096. Its totient is φ = 259217712.

The previous prime is 421229269. The next prime is 421229293. The reversal of 421229289 is 982922124.

It is not a de Polignac number, because 421229289 - 2⁸ = 421229033 is a prime.

It is a super-2 number, since 2×421229289² = 354868227822891042, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (421229219) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 414907 + ... + 415920.

It is an arithmetic number, because the mean of its divisors is an integer number (50680508).

Almost surely, 2^421229289 is an apocalyptic number.

It is an amenable number.

421229289 is a deficient number, since it is larger than the sum of its proper divisors (186936807).

421229289 is a wasteful number, since it uses less digits than its factorization.

421229289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 830856 (or 830843 counting only the distinct ones).

The product of its digits is 41472, while the sum is 39.

The square root of 421229289 is about 20523.8711991671. The cubic root of 421229289 is about 749.6171610568.

The spelling of 421229289 in words is "four hundred twenty-one million, two hundred twenty-nine thousand, two hundred eighty-nine".