402132242 has 4 divisors (see below), whose sum is σ = 603198366. Its totient is φ = 201066120.

The previous prime is 402132197. The next prime is 402132281. The reversal of 402132242 is 242231204.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 388523521 + 13608721 = 19711^2 + 3689^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100533059 + ... + 100533062.

Almost surely, 2^402132242 is an apocalyptic number.

402132242 is a deficient number, since it is larger than the sum of its proper divisors (201066124).

402132242 is a wasteful number, since it uses less digits than its factorization.

402132242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201066123.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 402132242 is about 20053.2352003361. The cubic root of 402132242 is about 738.1131880848.

Adding to 402132242 its reverse (242231204), we get a palindrome (644363446).

It can be divided in two parts, 4021 and 32242, that added together give a palindrome (36263).

The spelling of 402132242 in words is "four hundred two million, one hundred thirty-two thousand, two hundred forty-two".