621459 has 8 divisors (see below), whose sum is σ = 920720. Its totient is φ = 414288.

The previous prime is 621451. The next prime is 621461. The reversal of 621459 is 954126.

It is not a de Polignac number, because 621459 - 2³ = 621451 is a prime.

It is a super-2 number, since 2×621459² = 772422577362, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 23017 = 621459 / (6 + 2 + 1 + 4 + 5 + 9).

It is a Duffinian number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (621451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11482 + ... + 11535.

It is an arithmetic number, because the mean of its divisors is an integer number (115090).

2⁶²¹⁴⁵⁹ is an apocalyptic number.

621459 is a deficient number, since it is larger than the sum of its proper divisors (299261).

621459 is a wasteful number, since it uses less digits than its factorization.

621459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23026 (or 23020 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 621459 is about 788.3267089221. The cubic root of 621459 is about 85.3370241052.

It can be divided in two parts, 62 and 1459, that added together give a square (1521 = 39²).

The spelling of 621459 in words is "six hundred twenty-one thousand, four hundred fifty-nine".