402123442 has 16 divisors (see below), whose sum is σ = 692220672. Its totient is φ = 171622080.

The previous prime is 402123427. The next prime is 402123443. The reversal of 402123442 is 244321204.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (402123443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56218 + ... + 62965.

It is an arithmetic number, because the mean of its divisors is an integer number (43263792).

Almost surely, 2^402123442 is an apocalyptic number.

402123442 is a deficient number, since it is larger than the sum of its proper divisors (290097230).

402123442 is a wasteful number, since it uses less digits than its factorization.

402123442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119433.

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

The square root of 402123442 is about 20053.0157831684. The cubic root of 402123442 is about 738.1078039162.

Adding to 402123442 its reverse (244321204), we get a palindrome (646444646).

The spelling of 402123442 in words is "four hundred two million, one hundred twenty-three thousand, four hundred forty-two".