421400402 has 8 divisors (see below), whose sum is σ = 645549696. Its totient is φ = 206217172.

The previous prime is 421400389. The next prime is 421400423. The reversal of 421400402 is 204004124.

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

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, 2241398 + ... + 2241585.

It is an arithmetic number, because the mean of its divisors is an integer number (80693712).

Almost surely, 2^421400402 is an apocalyptic number.

421400402 is a deficient number, since it is larger than the sum of its proper divisors (224149294).

421400402 is a wasteful number, since it uses less digits than its factorization.

421400402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4483032.

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 421400402 is about 20528.0394095491. The cubic root of 421400402 is about 749.7186512111.

Adding to 421400402 its reverse (204004124), we get a palindrome (625404526).

The spelling of 421400402 in words is "four hundred twenty-one million, four hundred thousand, four hundred two".