1021056252 has 24 divisors (see below), whose sum is σ = 2383025232. Its totient is φ = 340272000.

The previous prime is 1021056221. The next prime is 1021056263. The reversal of 1021056252 is 2526501201.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66502 + ... + 80402.

It is an arithmetic number, because the mean of its divisors is an integer number (99292718).

Almost surely, 2^1021056252 is an apocalyptic number.

1021056252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1021056252 is an abundant number, since it is smaller than the sum of its proper divisors (1361968980).

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

1021056252 is a wasteful number, since it uses less digits than its factorization.

1021056252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20029 (or 20027 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 1021056252 is about 31953.9708330592. The cubic root of 1021056252 is about 1006.9700561121.

Adding to 1021056252 its reverse (2526501201), we get a palindrome (3547557453).

The spelling of 1021056252 in words is "one billion, twenty-one million, fifty-six thousand, two hundred fifty-two".