290421025 has 6 divisors (see below), whose sum is σ = 360122102. Its totient is φ = 232336800.

The previous prime is 290420987. The next prime is 290421041. The reversal of 290421025 is 520124092.

It can be written as a sum of positive squares in 3 ways, for example, as 47279376 + 243141649 = 6876^2 + 15593^2 .

It is not a de Polignac number, because 290421025 - 2¹⁷ = 290289953 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 11616841 = 290421025 / (2 + 9 + 0 + 4 + 2 + 1 + 0 + 2 + 5).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5808396 + ... + 5808445.

Almost surely, 2^290421025 is an apocalyptic number.

290421025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

290421025 is a deficient number, since it is larger than the sum of its proper divisors (69701077).

290421025 is a wasteful number, since it uses less digits than its factorization.

290421025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11616851 (or 11616846 counting only the distinct ones).

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

The square root of 290421025 is about 17041.7436021083. The cubic root of 290421025 is about 662.2307627945.

The spelling of 290421025 in words is "two hundred ninety million, four hundred twenty-one thousand, twenty-five".