621902 has 8 divisors (see below), whose sum is σ = 950616. Its totient is φ = 305032.

The previous prime is 621893. The next prime is 621913. The reversal of 621902 is 209126.

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

It is a congruent number.

It is an unprimeable number.

621902 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2828 + ... + 3039.

It is an arithmetic number, because the mean of its divisors is an integer number (118827).

2⁶²¹⁹⁰² is an apocalyptic number.

621902 is a deficient number, since it is larger than the sum of its proper divisors (328714).

621902 is a wasteful number, since it uses less digits than its factorization.

621902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5922.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 621902 is about 788.6076337444. The cubic root of 621902 is about 85.3572964656.

The spelling of 621902 in words is "six hundred twenty-one thousand, nine hundred two".