621036 has 36 divisors (see below), whose sum is σ = 1691872. Its totient is φ = 190944.

The previous prime is 621031. The next prime is 621043. The reversal of 621036 is 630126.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (621031) by changing a digit.

621036 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 11 ways as a sum of consecutive naturals, for example, 196 + ... + 1131.

2⁶²¹⁰³⁶ is an apocalyptic number.

It is an amenable number.

621036 is an abundant number, since it is smaller than the sum of its proper divisors (1070836).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

621036 is a wasteful number, since it uses less digits than its factorization.

621036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1350 (or 1345 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 621036 is about 788.0583734724. The cubic root of 621036 is about 85.3176579822.

The spelling of 621036 in words is "six hundred twenty-one thousand, thirty-six".