621020452 has 48 divisors (see below), whose sum is σ = 1187948160. Its totient is φ = 282362112.

The previous prime is 621020441. The next prime is 621020459. The reversal of 621020452 is 254020126.

It is not an unprimeable number, because it can be changed into a prime (621020459) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1274953 + ... + 1275439.

It is an arithmetic number, because the mean of its divisors is an integer number (24748920).

Almost surely, 2^621020452 is an apocalyptic number.

It is an amenable number.

621020452 is a deficient number, since it is larger than the sum of its proper divisors (566927708).

621020452 is a wasteful number, since it uses less digits than its factorization.

621020452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 820 (or 818 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 621020452 is about 24920.2819406202. The cubic root of 621020452 is about 853.1694598378.

Adding to 621020452 its reverse (254020126), we get a palindrome (875040578).

It can be divided in two parts, 6210 and 20452, that added together give a palindrome (26662).

The spelling of 621020452 in words is "six hundred twenty-one million, twenty thousand, four hundred fifty-two".