402253512121442 has 8 divisors (see below), whose sum is σ = 616218146228736. Its totient is φ = 196847463378532.

The previous prime is 402253512121421. The next prime is 402253512121459. The reversal of 402253512121442 is 244121215352204.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 402253512121396 and 402253512121405.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2139646340978 + ... + 2139646341165.

It is an arithmetic number, because the mean of its divisors is an integer number (77027268278592).

Almost surely, 2^{402253512121442} is an apocalyptic number.

402253512121442 is a deficient number, since it is larger than the sum of its proper divisors (213964634107294).

402253512121442 is a wasteful number, since it uses less digits than its factorization.

402253512121442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4279292682192.

The product of its (nonzero) digits is 153600, while the sum is 38.

Adding to 402253512121442 its reverse (244121215352204), we get a palindrome (646374727473646).

The spelling of 402253512121442 in words is "four hundred two trillion, two hundred fifty-three billion, five hundred twelve million, one hundred twenty-one thousand, four hundred forty-two".