290242521 has 10 divisors (see below), whose sum is σ = 433572282. Its totient is φ = 193494960.

The previous prime is 290242483. The next prime is 290242523. The reversal of 290242521 is 125242092.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 286286400 + 3956121 = 16920^2 + 1989^2 .

It is not a de Polignac number, because 290242521 - 2⁹ = 290242009 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (290242523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1791540 + ... + 1791701.

Almost surely, 2^290242521 is an apocalyptic number.

It is an amenable number.

290242521 is a deficient number, since it is larger than the sum of its proper divisors (143329761).

290242521 is an equidigital number, since it uses as much as digits as its factorization.

290242521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3583253 (or 3583244 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 290242521 is about 17036.5055395759. The cubic root of 290242521 is about 662.0950574367.

The spelling of 290242521 in words is "two hundred ninety million, two hundred forty-two thousand, five hundred twenty-one".