402421342 has 16 divisors (see below), whose sum is σ = 628596000. Its totient is φ = 192981600.

The previous prime is 402421337. The next prime is 402421343. The reversal of 402421342 is 243124204.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402421343) 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, 14217 + ... + 31732.

It is an arithmetic number, because the mean of its divisors is an integer number (39287250).

Almost surely, 2^402421342 is an apocalyptic number.

402421342 is a deficient number, since it is larger than the sum of its proper divisors (226174658).

402421342 is a wasteful number, since it uses less digits than its factorization.

402421342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46131.

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

The square root of 402421342 is about 20060.4422184557. The cubic root of 402421342 is about 738.2900266009.

Adding to 402421342 its reverse (243124204), we get a palindrome (645545546).

The spelling of 402421342 in words is "four hundred two million, four hundred twenty-one thousand, three hundred forty-two".