621452 has 48 divisors (see below), whose sum is σ = 1340640. Its totient is φ = 248832.

The previous prime is 621451. The next prime is 621461. The reversal of 621452 is 254126.

It is a happy number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 621452.

It is not an unprimeable number, because it can be changed into a prime (621451) 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 15 ways as a sum of consecutive naturals, for example, 16778 + ... + 16814.

It is an arithmetic number, because the mean of its divisors is an integer number (27930).

2⁶²¹⁴⁵² is an apocalyptic number.

It is an amenable number.

621452 is an abundant number, since it is smaller than the sum of its proper divisors (719188).

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

621452 is a wasteful number, since it uses less digits than its factorization.

621452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90 (or 88 counting only the distinct ones).

The product of its digits is 480, while the sum is 20.

The square root of 621452 is about 788.3222691260. The cubic root of 621452 is about 85.3367036972.

Adding to 621452 its reverse (254126), we get a palindrome (875578).

The spelling of 621452 in words is "six hundred twenty-one thousand, four hundred fifty-two".