1021013249 has 2 divisors, whose sum is σ = 1021013250. Its totient is φ = 1021013248.

The previous prime is 1021013221. The next prime is 1021013269. The reversal of 1021013249 is 9423101201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 989731600 + 31281649 = 31460^2 + 5593^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021013249 - 2²⁴ = 1004236033 is a prime.

It is not a weakly prime, because it can be changed into another prime (1021013269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510506624 + 510506625.

It is an arithmetic number, because the mean of its divisors is an integer number (510506625).

Almost surely, 2^1021013249 is an apocalyptic number.

It is an amenable number.

1021013249 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021013249 is an equidigital number, since it uses as much as digits as its factorization.

1021013249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 1021013249 is about 31953.2979362068. The cubic root of 1021013249 is about 1006.9559193326.

The spelling of 1021013249 in words is "one billion, twenty-one million, thirteen thousand, two hundred forty-nine".