1252020520 has 32 divisors (see below), whose sum is σ = 2823621120. Its totient is φ = 499639360.

The previous prime is 1252020503. The next prime is 1252020527. The reversal of 1252020520 is 250202521.

It is not an unprimeable number, because it can be changed into a prime (1252020527) 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, 19072 + ... + 53551.

It is an arithmetic number, because the mean of its divisors is an integer number (88238160).

Almost surely, 2^1252020520 is an apocalyptic number.

1252020520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1252020520 is an abundant number, since it is smaller than the sum of its proper divisors (1571600600).

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

1252020520 is a wasteful number, since it uses less digits than its factorization.

1252020520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73065 (or 73061 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 1252020520 is about 35383.9019894641. The cubic root of 1252020520 is about 1077.7974430189.

The spelling of 1252020520 in words is "one billion, two hundred fifty-two million, twenty thousand, five hundred twenty".