402542121342 has 16 divisors (see below), whose sum is σ = 822213695232. Its totient is φ = 131325798360.

The previous prime is 402542121329. The next prime is 402542121347. The reversal of 402542121342 is 243121245204.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402542121347) 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, 713726884 + ... + 713727447.

It is an arithmetic number, because the mean of its divisors is an integer number (51388355952).

Almost surely, 2^402542121342 is an apocalyptic number.

402542121342 is an abundant number, since it is smaller than the sum of its proper divisors (419671573890).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

402542121342 is a wasteful number, since it uses less digits than its factorization.

402542121342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1427454383.

The product of its (nonzero) digits is 15360, while the sum is 30.

Adding to 402542121342 its reverse (243121245204), we get a palindrome (645663366546).

The spelling of 402542121342 in words is "four hundred two billion, five hundred forty-two million, one hundred twenty-one thousand, three hundred forty-two".