1021135252 has 6 divisors (see below), whose sum is σ = 1786986698. Its totient is φ = 510567624.

The previous prime is 1021135249. The next prime is 1021135279. The reversal of 1021135252 is 2525311201.

It can be written as a sum of positive squares in only one way, i.e., 1019780356 + 1354896 = 31934^2 + 1164^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127641903 + ... + 127641910.

Almost surely, 2^1021135252 is an apocalyptic number.

It is an amenable number.

1021135252 is a deficient number, since it is larger than the sum of its proper divisors (765851446).

1021135252 is a wasteful number, since it uses less digits than its factorization.

1021135252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255283817 (or 255283815 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 1021135252 is about 31955.2069622464. The cubic root of 1021135252 is about 1006.9960254887.

Adding to 1021135252 its reverse (2525311201), we get a palindrome (3546446453).

The spelling of 1021135252 in words is "one billion, twenty-one million, one hundred thirty-five thousand, two hundred fifty-two".