1252556064 has 36 divisors (see below), whose sum is σ = 3561957126. Its totient is φ = 417518592.

The previous prime is 1252556029. The next prime is 1252556069. The reversal of 1252556064 is 4606552521.

1252556064 is a `hidden beast` number, since 1 + 25 + 25 + 5 + 606 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1248915600 + 3640464 = 35340^2 + 1908^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1252556069) 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 5 ways as a sum of consecutive naturals, for example, 2174289 + ... + 2174864.

Almost surely, 2^1252556064 is an apocalyptic number.

It is an amenable number.

1252556064 is an abundant number, since it is smaller than the sum of its proper divisors (2309401062).

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

1252556064 is a wasteful number, since it uses less digits than its factorization.

1252556064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4349169 (or 4349158 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The square root of 1252556064 is about 35391.4688025236. The cubic root of 1252556064 is about 1077.9510948335.

The spelling of 1252556064 in words is "one billion, two hundred fifty-two million, five hundred fifty-six thousand, sixty-four".