402142234 has 8 divisors (see below), whose sum is σ = 649614420. Its totient is φ = 185604096.

The previous prime is 402142219. The next prime is 402142243. The reversal of 402142234 is 432241204.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 398122209 + 4020025 = 19953^2 + 2005^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7733479 + ... + 7733530.

Almost surely, 2^402142234 is an apocalyptic number.

402142234 is a deficient number, since it is larger than the sum of its proper divisors (247472186).

402142234 is a wasteful number, since it uses less digits than its factorization.

402142234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15467024.

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

The square root of 402142234 is about 20053.4843356460. The cubic root of 402142234 is about 738.1193014684.

Adding to 402142234 its reverse (432241204), we get a palindrome (834383438).

The spelling of 402142234 in words is "four hundred two million, one hundred forty-two thousand, two hundred thirty-four".