1021453249 has 2 divisors, whose sum is σ = 1021453250. Its totient is φ = 1021453248.

The previous prime is 1021453229. The next prime is 1021453273. The reversal of 1021453249 is 9423541201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 952031025 + 69422224 = 30855^2 + 8332^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021453249 - 2¹¹ = 1021451201 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1021453249.

It is not a weakly prime, because it can be changed into another prime (1021453229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510726624 + 510726625.

It is an arithmetic number, because the mean of its divisors is an integer number (510726625).

Almost surely, 2^1021453249 is an apocalyptic number.

It is an amenable number.

1021453249 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021453249 is an equidigital number, since it uses as much as digits as its factorization.

1021453249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 1021453249 is about 31960.1822429097. The cubic root of 1021453249 is about 1007.1005459165.

The spelling of 1021453249 in words is "one billion, twenty-one million, four hundred fifty-three thousand, two hundred forty-nine".