421691402 has 8 divisors (see below), whose sum is σ = 690040512. Its totient is φ = 191677900.

The previous prime is 421691401. The next prime is 421691449. The reversal of 421691402 is 204196124.

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

It is not an unprimeable number, because it can be changed into a prime (421691401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9583874 + ... + 9583917.

It is an arithmetic number, because the mean of its divisors is an integer number (86255064).

Almost surely, 2^421691402 is an apocalyptic number.

421691402 is a deficient number, since it is larger than the sum of its proper divisors (268349110).

421691402 is a wasteful number, since it uses less digits than its factorization.

421691402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19167804.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 421691402 is about 20535.1260526932. The cubic root of 421691402 is about 749.8911853985.

The spelling of 421691402 in words is "four hundred twenty-one million, six hundred ninety-one thousand, four hundred two".