402424002314021 has 4 divisors (see below), whose sum is σ = 402425426516652. Its totient is φ = 402422578111392.

The previous prime is 402424002313999. The next prime is 402424002314029. The reversal of 402424002314021 is 120413200424204.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 124788895101025 + 277635107212996 = 11170895^2 + 16662386^2 .

It is a cyclic number.

It is not a de Polignac number, because 402424002314021 - 2³⁸ = 402149124407077 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 (402424002314029) 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, 711677390 + ... + 712242623.

It is an arithmetic number, because the mean of its divisors is an integer number (100606356629163).

Almost surely, 2^{402424002314021} is an apocalyptic number.

It is an amenable number.

402424002314021 is a deficient number, since it is larger than the sum of its proper divisors (1424202631).

402424002314021 is a wasteful number, since it uses less digits than its factorization.

402424002314021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1424202630.

The product of its (nonzero) digits is 12288, while the sum is 29.

Adding to 402424002314021 its reverse (120413200424204), we get a palindrome (522837202738225).

The spelling of 402424002314021 in words is "four hundred two trillion, four hundred twenty-four billion, two million, three hundred fourteen thousand, twenty-one".