621290 has 8 divisors (see below), whose sum is σ = 1118340. Its totient is φ = 248512.

The previous prime is 621289. The next prime is 621301. The reversal of 621290 is 92126.

It can be written as a sum of positive squares in 2 ways, for example, as 591361 + 29929 = 769^2 + 173^2 .

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

It is a plaindrome in base 14.

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, 31055 + ... + 31074.

2⁶²¹²⁹⁰ is an apocalyptic number.

621290 is a deficient number, since it is larger than the sum of its proper divisors (497050).

621290 is a wasteful number, since it uses less digits than its factorization.

621290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62136.

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

The square root of 621290 is about 788.2195125725. The cubic root of 621290 is about 85.3292878670.

The spelling of 621290 in words is "six hundred twenty-one thousand, two hundred ninety".