1021513412 has 6 divisors (see below), whose sum is σ = 1787648478. Its totient is φ = 510756704.

The previous prime is 1021513411. The next prime is 1021513417. The reversal of 1021513412 is 2143151201.

1021513412 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 727596676 + 293916736 = 26974^2 + 17144^2 .

It is not an unprimeable number, because it can be changed into a prime (1021513411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127689173 + ... + 127689180.

It is an arithmetic number, because the mean of its divisors is an integer number (297941413).

Almost surely, 2^1021513412 is an apocalyptic number.

It is an amenable number.

1021513412 is a deficient number, since it is larger than the sum of its proper divisors (766135066).

1021513412 is a wasteful number, since it uses less digits than its factorization.

1021513412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255378357 (or 255378355 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 1021513412 is about 31961.1234470880. The cubic root of 1021513412 is about 1007.1203180730.

Adding to 1021513412 its reverse (2143151201), we get a palindrome (3164664613).

The spelling of 1021513412 in words is "one billion, twenty-one million, five hundred thirteen thousand, four hundred twelve".