621271 has 12 divisors (see below), whose sum is σ = 747840. Its totient is φ = 514080.

The previous prime is 621259. The next prime is 621289. The reversal of 621271 is 172126.

It is not a de Polignac number, because 621271 - 2⁵ = 621239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1315 + ... + 1723.

It is an arithmetic number, because the mean of its divisors is an integer number (62320).

2⁶²¹²⁷¹ is an apocalyptic number.

621271 is a deficient number, since it is larger than the sum of its proper divisors (126569).

621271 is a wasteful number, since it uses less digits than its factorization.

621271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454 (or 447 counting only the distinct ones).

The product of its digits is 168, while the sum is 19.

The square root of 621271 is about 788.2074600002. The cubic root of 621271 is about 85.3284180247.

Adding to 621271 its reverse (172126), we get a palindrome (793397).

It can be divided in two parts, 62127 and 1, that added together give a triangular number (62128 = T₃₅₂).

The spelling of 621271 in words is "six hundred twenty-one thousand, two hundred seventy-one".