421312053 has 4 divisors (see below), whose sum is σ = 561749408. Its totient is φ = 280874700.

The previous prime is 421312033. The next prime is 421312057. The reversal of 421312053 is 350213124.

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 not a de Polignac number, because 421312053 - 2²² = 417117749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421312057) 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, 70218673 + ... + 70218678.

It is an arithmetic number, because the mean of its divisors is an integer number (140437352).

Almost surely, 2^421312053 is an apocalyptic number.

It is an amenable number.

421312053 is a deficient number, since it is larger than the sum of its proper divisors (140437355).

421312053 is a wasteful number, since it uses less digits than its factorization.

421312053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140437354.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 421312053 is about 20525.8873864201. The cubic root of 421312053 is about 749.6662532840. Note that the first 3 decimals are identical.

Adding to 421312053 its reverse (350213124), we get a palindrome (771525177).

The spelling of 421312053 in words is "four hundred twenty-one million, three hundred twelve thousand, fifty-three".