402102015 has 32 divisors (see below), whose sum is σ = 738118656. Its totient is φ = 183106560.

The previous prime is 402101989. The next prime is 402102053. The reversal of 402102015 is 510201204.

It is not a de Polignac number, because 402102015 - 2⁵ = 402101983 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a junction number, because it is equal to n+sod(n) for n = 402101985 and 402102003.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20335 + ... + 34895.

It is an arithmetic number, because the mean of its divisors is an integer number (23066208).

Almost surely, 2^402102015 is an apocalyptic number.

402102015 is a deficient number, since it is larger than the sum of its proper divisors (336016641).

402102015 is a wasteful number, since it uses less digits than its factorization.

402102015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14839.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 402102015 is about 20052.4815172587. The cubic root of 402102015 is about 738.0946937488.

Adding to 402102015 its reverse (510201204), we get a palindrome (912303219).

The spelling of 402102015 in words is "four hundred two million, one hundred two thousand, fifteen".