627421 has 4 divisors (see below), whose sum is σ = 629244. Its totient is φ = 625600.

The previous prime is 627391. The next prime is 627433. The reversal of 627421 is 124726.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 151321 + 476100 = 389^2 + 690^2 .

It is a cyclic number.

It is not a de Polignac number, because 627421 - 2⁷ = 627293 is a prime.

It is a super-2 number, since 2×627421² = 787314222482, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 627392 and 627401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (627481) 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, 220 + ... + 1141.

It is an arithmetic number, because the mean of its divisors is an integer number (157311).

2⁶²⁷⁴²¹ is an apocalyptic number.

It is an amenable number.

627421 is a deficient number, since it is larger than the sum of its proper divisors (1823).

627421 is a wasteful number, since it uses less digits than its factorization.

627421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1822.

The product of its digits is 672, while the sum is 22.

The square root of 627421 is about 792.0991099604. The cubic root of 627421 is about 85.6090511435.

The spelling of 627421 in words is "six hundred twenty-seven thousand, four hundred twenty-one".