1021136252 has 24 divisors (see below), whose sum is σ = 1805395200. Its totient is φ = 505322496.

The previous prime is 1021136231. The next prime is 1021136257. The reversal of 1021136252 is 2526311201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021136257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 454949 + ... + 457187.

It is an arithmetic number, because the mean of its divisors is an integer number (75224800).

Almost surely, 2^1021136252 is an apocalyptic number.

It is an amenable number.

1021136252 is a deficient number, since it is larger than the sum of its proper divisors (784258948).

1021136252 is a wasteful number, since it uses less digits than its factorization.

1021136252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3365 (or 3363 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 1021136252 is about 31955.2226091448. Note that the first 3 decimals coincide. The cubic root of 1021136252 is about 1006.9963542064.

Adding to 1021136252 its reverse (2526311201), we get a palindrome (3547447453).

The spelling of 1021136252 in words is "one billion, twenty-one million, one hundred thirty-six thousand, two hundred fifty-two".