424661 has 2 divisors, whose sum is σ = 424662. Its totient is φ = 424660.

The previous prime is 424639. The next prime is 424667. The reversal of 424661 is 166424.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 244036 + 180625 = 494^2 + 425^2 .

It is a cyclic number.

It is not a de Polignac number, because 424661 - 2⁶ = 424597 is a prime.

It is a Chen prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 424661.

It is not a weakly prime, because it can be changed into another prime (424667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212330 + 212331.

It is an arithmetic number, because the mean of its divisors is an integer number (212331).

2⁴²⁴⁶⁶¹ is an apocalyptic number.

It is an amenable number.

424661 is a deficient number, since it is larger than the sum of its proper divisors (1).

424661 is an equidigital number, since it uses as much as digits as its factorization.

424661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 23.

The square root of 424661 is about 651.6601875211. The cubic root of 424661 is about 75.1647342000.

The spelling of 424661 in words is "four hundred twenty-four thousand, six hundred sixty-one".