649252 has 18 divisors (see below), whose sum is σ = 1182818. Its totient is φ = 311808.

The previous prime is 649217. The next prime is 649261. The reversal of 649252 is 252946.

It can be written as a sum of positive squares in 3 ways, for example, as 50176 + 599076 = 224^2 + 774^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 649252.

It is an unprimeable number.

649252 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3268 + ... + 3460.

2⁶⁴⁹²⁵² is an apocalyptic number.

It is an amenable number.

649252 is a deficient number, since it is larger than the sum of its proper divisors (533566).

649252 is a wasteful number, since it uses less digits than its factorization.

649252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255 (or 224 counting only the distinct ones).

The product of its digits is 4320, while the sum is 28.

The square root of 649252 is about 805.7617513881. The cubic root of 649252 is about 86.5906697364.

It can be divided in two parts, 64 and 9252, that added together give a triangular number (9316 = T₁₃₆).

The spelling of 649252 in words is "six hundred forty-nine thousand, two hundred fifty-two".