290254021 has 4 divisors (see below), whose sum is σ = 290366892. Its totient is φ = 290141152.

The previous prime is 290254007. The next prime is 290254031. The reversal of 290254021 is 120452092.

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 182385025 + 107868996 = 13505^2 + 10386^2 .

It is a cyclic number.

It is not a de Polignac number, because 290254021 - 2¹⁹ = 289729733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (290254031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52486 + ... + 57751.

It is an arithmetic number, because the mean of its divisors is an integer number (72591723).

Almost surely, 2^290254021 is an apocalyptic number.

It is an amenable number.

290254021 is a deficient number, since it is larger than the sum of its proper divisors (112871).

290254021 is a wasteful number, since it uses less digits than its factorization.

290254021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112870.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 290254021 is about 17036.8430467619. The cubic root of 290254021 is about 662.1038018395.

The spelling of 290254021 in words is "two hundred ninety million, two hundred fifty-four thousand, twenty-one".