620901 has 12 divisors (see below), whose sum is σ = 944320. Its totient is φ = 392040.

The previous prime is 620887. The next prime is 620909. The reversal of 620901 is 109026.

It is not a de Polignac number, because 620901 - 2⁵ = 620869 is a prime.

It is a Duffinian number.

620901 is a lucky number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 620901.

It is not an unprimeable number, because it can be changed into a prime (620909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1645 + ... + 1986.

2⁶²⁰⁹⁰¹ is an apocalyptic number.

It is an amenable number.

620901 is a deficient number, since it is larger than the sum of its proper divisors (323419).

620901 is a wasteful number, since it uses less digits than its factorization.

620901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3656 (or 3653 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 620901 is about 787.9727152637. The cubic root of 620901 is about 85.3114754536.

Adding to 620901 its reverse (109026), we get a palindrome (729927).

It can be divided in two parts, 620 and 901, that added together give a square (1521 = 39²).

The spelling of 620901 in words is "six hundred twenty thousand, nine hundred one".