507321025 has 6 divisors (see below), whose sum is σ = 629078102. Its totient is φ = 405856800.

The previous prime is 507321013. The next prime is 507321029. The reversal of 507321025 is 520123705.

It can be written as a sum of positive squares in 3 ways, for example, as 22924944 + 484396081 = 4788^2 + 22009^2 .

It is not a de Polignac number, because 507321025 - 2¹³ = 507312833 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: 20292841 = 507321025 / (5 + 0 + 7 + 3 + 2 + 1 + 0 + 2 + 5).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (507321029) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10146396 + ... + 10146445.

Almost surely, 2^507321025 is an apocalyptic number.

It is an amenable number.

507321025 is a deficient number, since it is larger than the sum of its proper divisors (121757077).

507321025 is a wasteful number, since it uses less digits than its factorization.

507321025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20292851 (or 20292846 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 25.

The square root of 507321025 is about 22523.7879807105. The cubic root of 507321025 is about 797.5555724288. Note that the first 4 decimals are identical.

The spelling of 507321025 in words is "five hundred seven million, three hundred twenty-one thousand, twenty-five".