402942 has 8 divisors (see below), whose sum is σ = 805896. Its totient is φ = 134312.

The previous prime is 402923. The next prime is 402943. The reversal of 402942 is 249204.

402942 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

402942 is an admirable number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 402942.

It is not an unprimeable number, because it can be changed into a prime (402943) by changing a digit.

402942 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33573 + ... + 33584.

It is an arithmetic number, because the mean of its divisors is an integer number (100737).

2⁴⁰²⁹⁴² is an apocalyptic number.

402942 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

402942 is a wasteful number, since it uses less digits than its factorization.

402942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67162.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 402942 is about 634.7771262420. Note that the first 3 decimals coincide. The cubic root of 402942 is about 73.8608292482.

The spelling of 402942 in words is "four hundred two thousand, nine hundred forty-two".