402415 has 16 divisors (see below), whose sum is σ = 536256. Its totient is φ = 288000.

The previous prime is 402403. The next prime is 402419. The reversal of 402415 is 514204.

It is not a de Polignac number, because 402415 - 2⁵ = 402383 is a prime.

It is a Duffinian number.

402415 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402419) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2590 + ... + 2740.

It is an arithmetic number, because the mean of its divisors is an integer number (33516).

2⁴⁰²⁴¹⁵ is an apocalyptic number.

402415 is a deficient number, since it is larger than the sum of its proper divisors (133841).

402415 is a wasteful number, since it uses less digits than its factorization.

402415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210.

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 402415 is about 634.3618841009. The cubic root of 402415 is about 73.8286148195.

Adding to 402415 its reverse (514204), we get a palindrome (916619).

The spelling of 402415 in words is "four hundred two thousand, four hundred fifteen".