655321025 has 6 divisors (see below), whose sum is σ = 812598102. Its totient is φ = 524256800.

The previous prime is 655321003. The next prime is 655321087. The reversal of 655321025 is 520123556.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 3182656 + 652138369 = 1784^2 + 25537^2 .

It is not a de Polignac number, because 655321025 - 2⁶ = 655320961 is a prime.

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, 13106396 + ... + 13106445.

It is an arithmetic number, because the mean of its divisors is an integer number (135433017).

Almost surely, 2^655321025 is an apocalyptic number.

It is an amenable number.

655321025 is a deficient number, since it is larger than the sum of its proper divisors (157277077).

655321025 is a wasteful number, since it uses less digits than its factorization.

655321025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26212851 (or 26212846 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 29.

The square root of 655321025 is about 25599.2387582131. The cubic root of 655321025 is about 868.5964178241.

The spelling of 655321025 in words is "six hundred fifty-five million, three hundred twenty-one thousand, twenty-five".