655720425 has 18 divisors (see below), whose sum is σ = 1174468542. Its totient is φ = 349717440.

The previous prime is 655720423. The next prime is 655720451. The reversal of 655720425 is 524027556.

655720425 is a `hidden beast` number, since 65 + 572 + 0 + 4 + 25 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 112084569 + 543635856 = 10587^2 + 23316^2 .

It is not a de Polignac number, because 655720425 - 2¹ = 655720423 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 655720425.

It is not an unprimeable number, because it can be changed into a prime (655720423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1456932 + ... + 1457381.

Almost surely, 2^655720425 is an apocalyptic number.

It is an amenable number.

655720425 is a deficient number, since it is larger than the sum of its proper divisors (518748117).

655720425 is a wasteful number, since it uses less digits than its factorization.

655720425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2914329 (or 2914321 counting only the distinct ones).

The product of its (nonzero) digits is 84000, while the sum is 36.

The square root of 655720425 is about 25607.0385831708. The cubic root of 655720425 is about 868.7728438001.

The spelling of 655720425 in words is "six hundred fifty-five million, seven hundred twenty thousand, four hundred twenty-five".