285424621 has 2 divisors, whose sum is σ = 285424622. Its totient is φ = 285424620.

The previous prime is 285424609. The next prime is 285424627. The reversal of 285424621 is 126424582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 177555625 + 107868996 = 13325^2 + 10386^2 .

It is a cyclic number.

It is not a de Polignac number, because 285424621 - 2⁵ = 285424589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (285424627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142712310 + 142712311.

It is an arithmetic number, because the mean of its divisors is an integer number (142712311).

Almost surely, 2^285424621 is an apocalyptic number.

It is an amenable number.

285424621 is a deficient number, since it is larger than the sum of its proper divisors (1).

285424621 is an equidigital number, since it uses as much as digits as its factorization.

285424621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30720, while the sum is 34.

The square root of 285424621 is about 16894.5145239513. The cubic root of 285424621 is about 658.4111006282.

The spelling of 285424621 in words is "two hundred eighty-five million, four hundred twenty-four thousand, six hundred twenty-one".