402142342 has 16 divisors (see below), whose sum is σ = 690062112. Its totient is φ = 172177920.

The previous prime is 402142339. The next prime is 402142379. The reversal of 402142342 is 243241204.

It is a happy number.

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, 1318 + ... + 28390.

It is an arithmetic number, because the mean of its divisors is an integer number (43128882).

Almost surely, 2^402142342 is an apocalyptic number.

402142342 is a deficient number, since it is larger than the sum of its proper divisors (287919770).

402142342 is a wasteful number, since it uses less digits than its factorization.

402142342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28143.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 402142342 is about 20053.4870284447. The cubic root of 402142342 is about 738.1193675452.

Adding to 402142342 its reverse (243241204), we get a palindrome (645383546).

The spelling of 402142342 in words is "four hundred two million, one hundred forty-two thousand, three hundred forty-two".