427621 has 2 divisors, whose sum is σ = 427622. Its totient is φ = 427620.

The previous prime is 427619. The next prime is 427681. The reversal of 427621 is 126724.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 376996 + 50625 = 614^2 + 225^2 .

It is a cyclic number.

It is not a de Polignac number, because 427621 - 2¹ = 427619 is a prime.

Together with 427619, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 427592 and 427601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (427681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213810 + 213811.

It is an arithmetic number, because the mean of its divisors is an integer number (213811).

2⁴²⁷⁶²¹ is an apocalyptic number.

It is an amenable number.

427621 is a deficient number, since it is larger than the sum of its proper divisors (1).

427621 is an equidigital number, since it uses as much as digits as its factorization.

427621 is an odious number, because the sum of its binary digits is odd.

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

The square root of 427621 is about 653.9273659972. The cubic root of 427621 is about 75.3389693924.

The spelling of 427621 in words is "four hundred twenty-seven thousand, six hundred twenty-one".