421001402 has 8 divisors (see below), whose sum is σ = 632711136. Its totient is φ = 210097692.

The previous prime is 421001389. The next prime is 421001423. The reversal of 421001402 is 204100124.

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

It is a super-3 number, since 3×421001402³ (a number of 27 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200198 + ... + 202289.

It is an arithmetic number, because the mean of its divisors is an integer number (79088892).

Almost surely, 2^421001402 is an apocalyptic number.

421001402 is a deficient number, since it is larger than the sum of its proper divisors (211709734).

421001402 is a wasteful number, since it uses less digits than its factorization.

421001402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403012.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 421001402 is about 20518.3186933043. The cubic root of 421001402 is about 749.4819545506.

Adding to 421001402 its reverse (204100124), we get a palindrome (625101526).

The spelling of 421001402 in words is "four hundred twenty-one million, one thousand, four hundred two".