421421044 has 24 divisors (see below), whose sum is σ = 805593600. Its totient is φ = 191302080.

The previous prime is 421421029. The next prime is 421421047. The reversal of 421421044 is 440124124.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421421047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29677 + ... + 41515.

It is an arithmetic number, because the mean of its divisors is an integer number (33566400).

Almost surely, 2^421421044 is an apocalyptic number.

421421044 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

421421044 is a deficient number, since it is larger than the sum of its proper divisors (384172556).

421421044 is a wasteful number, since it uses less digits than its factorization.

421421044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12663 (or 12661 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

The square root of 421421044 is about 20528.5421791222. The cubic root of 421421044 is about 749.7308924901.

Adding to 421421044 its reverse (440124124), we get a palindrome (861545168).

The spelling of 421421044 in words is "four hundred twenty-one million, four hundred twenty-one thousand, forty-four".