842402 has 18 divisors (see below), whose sum is σ = 1412859. Its totient is φ = 376420.

The previous prime is 842399. The next prime is 842407. The reversal of 842402 is 204248.

842402 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 421201 + 421201 = 649^2 + 649^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=649.

It is a super-2 number, since 2×842402² = 1419282259208, which contains 22 as substring.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 842402.

It is not an unprimeable number, because it can be changed into a prime (842407) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 14249 + ... + 14307.

2⁸⁴²⁴⁰² is an apocalyptic number.

842402 is a deficient number, since it is larger than the sum of its proper divisors (570457).

842402 is a wasteful number, since it uses less digits than its factorization.

842402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142 (or 72 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 842402 is about 917.8246019801. The cubic root of 842402 is about 94.4437297396.

Multiplying 842402 by its product of nonzero digits (512), we get a square (431309824 = 20768²).

The spelling of 842402 in words is "eight hundred forty-two thousand, four hundred two".