1045915261 has 2 divisors, whose sum is σ = 1045915262. Its totient is φ = 1045915260.

The previous prime is 1045915229. The next prime is 1045915279. The reversal of 1045915261 is 1625195401.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 670292100 + 375623161 = 25890^2 + 19381^2 .

It is a cyclic number.

It is not a de Polignac number, because 1045915261 - 2⁵ = 1045915229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1045915201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 522957630 + 522957631.

It is an arithmetic number, because the mean of its divisors is an integer number (522957631).

Almost surely, 2^1045915261 is an apocalyptic number.

It is an amenable number.

1045915261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1045915261 is an equidigital number, since it uses as much as digits as its factorization.

1045915261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 34.

The square root of 1045915261 is about 32340.6131821894. The cubic root of 1045915261 is about 1015.0766396060.

The spelling of 1045915261 in words is "one billion, forty-five million, nine hundred fifteen thousand, two hundred sixty-one".