1252020564 has 72 divisors (see below), whose sum is σ = 3311380800. Its totient is φ = 413610624.

The previous prime is 1252020557. The next prime is 1252020593. The reversal of 1252020564 is 4650202521.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 104137 + ... + 115535.

It is an arithmetic number, because the mean of its divisors is an integer number (45991400).

Almost surely, 2^1252020564 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1252020564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1655690400).

1252020564 is an abundant number, since it is smaller than the sum of its proper divisors (2059360236).

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

1252020564 is a wasteful number, since it uses less digits than its factorization.

1252020564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11531 (or 11517 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 1252020564 is about 35383.9026112157. The cubic root of 1252020564 is about 1077.7974556446.

The spelling of 1252020564 in words is "one billion, two hundred fifty-two million, twenty thousand, five hundred sixty-four".