402153621 has 4 divisors (see below), whose sum is σ = 536204832. Its totient is φ = 268102412.

The previous prime is 402153593. The next prime is 402153623. The reversal of 402153621 is 126351204.

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 a cyclic number.

It is not a de Polignac number, because 402153621 - 2⁹ = 402153109 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 402153591 and 402153600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402153623) 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, 67025601 + ... + 67025606.

It is an arithmetic number, because the mean of its divisors is an integer number (134051208).

Almost surely, 2^402153621 is an apocalyptic number.

It is an amenable number.

402153621 is a deficient number, since it is larger than the sum of its proper divisors (134051211).

402153621 is a wasteful number, since it uses less digits than its factorization.

402153621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134051210.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 402153621 is about 20053.7682493840. The cubic root of 402153621 is about 738.1262682282.

The spelling of 402153621 in words is "four hundred two million, one hundred fifty-three thousand, six hundred twenty-one".