621253 has 4 divisors (see below), whose sum is σ = 648288. Its totient is φ = 594220.

The previous prime is 621241. The next prime is 621259. The reversal of 621253 is 352126.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 352126 = 2 ⋅176063.

It is a cyclic number.

It is not a de Polignac number, because 621253 - 2¹³ = 613061 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 621253.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621259) 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 3 ways as a sum of consecutive naturals, for example, 13483 + ... + 13528.

It is an arithmetic number, because the mean of its divisors is an integer number (162072).

2⁶²¹²⁵³ is an apocalyptic number.

It is an amenable number.

621253 is a deficient number, since it is larger than the sum of its proper divisors (27035).

621253 is a wasteful number, since it uses less digits than its factorization.

621253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27034.

The product of its digits is 360, while the sum is 19.

The square root of 621253 is about 788.1960416039. The cubic root of 621253 is about 85.3275939472.

Adding to 621253 its reverse (352126), we get a palindrome (973379).

It can be divided in two parts, 62125 and 3, that added together give a triangular number (62128 = T₃₅₂).

The spelling of 621253 in words is "six hundred twenty-one thousand, two hundred fifty-three".