655121252 has 24 divisors (see below), whose sum is σ = 1188095160. Its totient is φ = 315705600.

The previous prime is 655121251. The next prime is 655121261. The reversal of 655121252 is 252121556.

It can be written as a sum of positive squares in 4 ways, for example, as 35808256 + 619312996 = 5984^2 + 24886^2 .

It is a Harshad number since it is a multiple of its sum of digits (29).

It is not an unprimeable number, because it can be changed into a prime (655121251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65018 + ... + 74414.

It is an arithmetic number, because the mean of its divisors is an integer number (49503965).

Almost surely, 2^655121252 is an apocalyptic number.

It is an amenable number.

655121252 is a deficient number, since it is larger than the sum of its proper divisors (532973908).

655121252 is a wasteful number, since it uses less digits than its factorization.

655121252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10031 (or 10029 counting only the distinct ones).

The product of its digits is 6000, while the sum is 29.

The square root of 655121252 is about 25595.3365283600. The cubic root of 655121252 is about 868.5081456942.

The spelling of 655121252 in words is "six hundred fifty-five million, one hundred twenty-one thousand, two hundred fifty-two".