620921285 has 8 divisors (see below), whose sum is σ = 745351200. Its totient is φ = 496573264.

The previous prime is 620921263. The next prime is 620921381. The reversal of 620921285 is 582129026.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 620921285 - 2⁶ = 620921221 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2327 + ... + 35316.

It is an arithmetic number, because the mean of its divisors is an integer number (93168900).

Almost surely, 2^620921285 is an apocalyptic number.

It is an amenable number.

620921285 is a deficient number, since it is larger than the sum of its proper divisors (124429915).

620921285 is a wasteful number, since it uses less digits than its factorization.

620921285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40947.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 620921285 is about 24918.2921766320. The cubic root of 620921285 is about 853.1240449300.

The spelling of 620921285 in words is "six hundred twenty million, nine hundred twenty-one thousand, two hundred eighty-five".