402015 has 8 divisors (see below), whose sum is σ = 643248. Its totient is φ = 214400.

The previous prime is 401993. The next prime is 402023. The reversal of 402015 is 510204.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 402015 - 2⁷ = 401887 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13386 + ... + 13415.

It is an arithmetic number, because the mean of its divisors is an integer number (80406).

2⁴⁰²⁰¹⁵ is an apocalyptic number.

402015 is a deficient number, since it is larger than the sum of its proper divisors (241233).

402015 is a wasteful number, since it uses less digits than its factorization.

402015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26809.

The product of its (nonzero) digits is 40, while the sum is 12.

The square root of 402015 is about 634.0465282611. The cubic root of 402015 is about 73.8041448601.

Adding to 402015 its reverse (510204), we get a palindrome (912219).

The spelling of 402015 in words is "four hundred two thousand, fifteen".