402105242 has 64 divisors (see below), whose sum is σ = 783820800. Its totient is φ = 150118080.

The previous prime is 402105239. The next prime is 402105281. The reversal of 402105242 is 242501204.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 799163 + ... + 799665.

It is an arithmetic number, because the mean of its divisors is an integer number (12247200).

Almost surely, 2^402105242 is an apocalyptic number.

402105242 is a deficient number, since it is larger than the sum of its proper divisors (381715558).

402105242 is a wasteful number, since it uses less digits than its factorization.

402105242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 731.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 402105242 is about 20052.5619809540. The cubic root of 402105242 is about 738.0966682272.

Adding to 402105242 its reverse (242501204), we get a palindrome (644606446).

The spelling of 402105242 in words is "four hundred two million, one hundred five thousand, two hundred forty-two".