402104013421 has 4 divisors (see below), whose sum is σ = 438658923744. Its totient is φ = 365549103100.

The previous prime is 402104013419. The next prime is 402104013449. The reversal of 402104013421 is 124310401204.

It is a happy number.

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 402104013421 - 2¹ = 402104013419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 402104013392 and 402104013401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402104013481) 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, 18277455145 + ... + 18277455166.

It is an arithmetic number, because the mean of its divisors is an integer number (109664730936).

Almost surely, 2^402104013421 is an apocalyptic number.

It is an amenable number.

402104013421 is a deficient number, since it is larger than the sum of its proper divisors (36554910323).

402104013421 is a wasteful number, since it uses less digits than its factorization.

402104013421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36554910322.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 402104013421 its reverse (124310401204), we get a palindrome (526414414625).

The spelling of 402104013421 in words is "four hundred two billion, one hundred four million, thirteen thousand, four hundred twenty-one".