402104665 has 4 divisors (see below), whose sum is σ = 482525604. Its totient is φ = 321683728.

The previous prime is 402104629. The next prime is 402104683. The reversal of 402104665 is 566401204.

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 238980681 + 163123984 = 15459^2 + 12772^2 .

It is a cyclic number.

It is not a de Polignac number, because 402104665 - 2¹³ = 402096473 is a prime.

It is a super-2 number, since 2×402104665² = 323376323229524450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40210462 + ... + 40210471.

It is an arithmetic number, because the mean of its divisors is an integer number (120631401).

Almost surely, 2^402104665 is an apocalyptic number.

It is an amenable number.

402104665 is a deficient number, since it is larger than the sum of its proper divisors (80420939).

402104665 is an equidigital number, since it uses as much as digits as its factorization.

402104665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80420938.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 402104665 is about 20052.5475937598. The cubic root of 402104665 is about 738.0963151837.

Adding to 402104665 its reverse (566401204), we get a palindrome (968505869).

The spelling of 402104665 in words is "four hundred two million, one hundred four thousand, six hundred sixty-five".