421400412 has 18 divisors (see below), whose sum is σ = 1065206688. Its totient is φ = 140466792.

The previous prime is 421400389. The next prime is 421400423. The reversal of 421400412 is 214004124.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5852748 + ... + 5852819.

Almost surely, 2^421400412 is an apocalyptic number.

It is an amenable number.

421400412 is an abundant number, since it is smaller than the sum of its proper divisors (643806276).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

421400412 is a wasteful number, since it uses less digits than its factorization.

421400412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11705577 (or 11705572 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 421400412 is about 20528.0396531184. The cubic root of 421400412 is about 749.7186571415.

Adding to 421400412 its reverse (214004124), we get a palindrome (635404536).

The spelling of 421400412 in words is "four hundred twenty-one million, four hundred thousand, four hundred twelve".