421401312 has 48 divisors (see below), whose sum is σ = 1229089680. Its totient is φ = 140466816.

The previous prime is 421401307. The next prime is 421401319. The reversal of 421401312 is 213104124.

It is a tau number, because it is divible by the number of its divisors (48).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421401319) 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, 243003 + ... + 244730.

It is an arithmetic number, because the mean of its divisors is an integer number (25606035).

Almost surely, 2^421401312 is an apocalyptic number.

It is an amenable number.

421401312 is an abundant number, since it is smaller than the sum of its proper divisors (807688368).

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

421401312 is a wasteful number, since it uses less digits than its factorization.

421401312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487752 (or 487738 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 421401312 is about 20528.0615743426. The cubic root of 421401312 is about 749.7191908748.

Adding to 421401312 its reverse (213104124), we get a palindrome (634505436).

The spelling of 421401312 in words is "four hundred twenty-one million, four hundred one thousand, three hundred twelve".