402121430 has 8 divisors (see below), whose sum is σ = 723818592. Its totient is φ = 160848568.

The previous prime is 402121411. The next prime is 402121457. The reversal of 402121430 is 34121204.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 402121399 and 402121408.

It is a congruent number.

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, 20106062 + ... + 20106081.

It is an arithmetic number, because the mean of its divisors is an integer number (90477324).

Almost surely, 2^402121430 is an apocalyptic number.

402121430 is a deficient number, since it is larger than the sum of its proper divisors (321697162).

402121430 is a wasteful number, since it uses less digits than its factorization.

402121430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40212150.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 402121430 is about 20052.9656160878. The cubic root of 402121430 is about 738.1065728884.

Adding to 402121430 its reverse (34121204), we get a palindrome (436242634).

The spelling of 402121430 in words is "four hundred two million, one hundred twenty-one thousand, four hundred thirty".