402421142 has 4 divisors (see below), whose sum is σ = 603631716. Its totient is φ = 201210570.

The previous prime is 402421111. The next prime is 402421153. The reversal of 402421142 is 241124204.

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

It is a congruent 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 as a sum of consecutive naturals, namely, 100605284 + ... + 100605287.

It is an arithmetic number, because the mean of its divisors is an integer number (150907929).

Almost surely, 2^402421142 is an apocalyptic number.

402421142 is a deficient number, since it is larger than the sum of its proper divisors (201210574).

402421142 is a wasteful number, since it uses less digits than its factorization.

402421142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201210573.

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 402421142 is about 20060.4372335201. The cubic root of 402421142 is about 738.2899042929.

Adding to 402421142 its reverse (241124204), we get a palindrome (643545346).

The spelling of 402421142 in words is "four hundred two million, four hundred twenty-one thousand, one hundred forty-two".