621774 has 12 divisors (see below), whose sum is σ = 1347216. Its totient is φ = 207252.

The previous prime is 621769. The next prime is 621779. The reversal of 621774 is 477126.

It is an interprime number because it is at equal distance from previous prime (621769) and next prime (621779).

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621779) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17254 + ... + 17289.

It is an arithmetic number, because the mean of its divisors is an integer number (112268).

2⁶²¹⁷⁷⁴ is an apocalyptic number.

621774 is an abundant number, since it is smaller than the sum of its proper divisors (725442).

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

621774 is a wasteful number, since it uses less digits than its factorization.

621774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34551 (or 34548 counting only the distinct ones).

The product of its digits is 2352, while the sum is 27.

The square root of 621774 is about 788.5264738739. The cubic root of 621774 is about 85.3514399783.

The spelling of 621774 in words is "six hundred twenty-one thousand, seven hundred seventy-four".