641061252 has 36 divisors (see below), whose sum is σ = 1745112460. Its totient is φ = 197249472.

The previous prime is 641061229. The next prime is 641061259. The reversal of 641061252 is 252160146.

641061252 is a `hidden beast` number, since 6 + 41 + 0 + 612 + 5 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 161188416 + 479872836 = 12696^2 + 21906^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (641061259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 684427 + ... + 685362.

Almost surely, 2^641061252 is an apocalyptic number.

It is an amenable number.

641061252 is an abundant number, since it is smaller than the sum of its proper divisors (1104051208).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

641061252 is a wasteful number, since it uses less digits than its factorization.

641061252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1369812 (or 1369807 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 641061252 is about 25319.1874277197. The cubic root of 641061252 is about 862.2499459114.

The spelling of 641061252 in words is "six hundred forty-one million, sixty-one thousand, two hundred fifty-two".