621042 has 16 divisors (see below), whose sum is σ = 1257120. Its totient is φ = 204512.

The previous prime is 621031. The next prime is 621043. The reversal of 621042 is 240126.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621043) by changing a digit.

621042 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 7 ways as a sum of consecutive naturals, for example, 48 + ... + 1115.

It is an arithmetic number, because the mean of its divisors is an integer number (78570).

2⁶²¹⁰⁴² is an apocalyptic number.

621042 is an abundant number, since it is smaller than the sum of its proper divisors (636078).

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

621042 is a wasteful number, since it uses less digits than its factorization.

621042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1257.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 621042 is about 788.0621802878. The cubic root of 621042 is about 85.3179327405.

Adding to 621042 its reverse (240126), we get a palindrome (861168).

The spelling of 621042 in words is "six hundred twenty-one thousand, forty-two".