1045958261 has 2 divisors, whose sum is σ = 1045958262. Its totient is φ = 1045958260.

The previous prime is 1045958237. The next prime is 1045958279. The reversal of 1045958261 is 1628595401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 600495025 + 445463236 = 24505^2 + 21106^2 .

It is an emirp because it is prime and its reverse (1628595401) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1045958261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1045958461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 522979130 + 522979131.

It is an arithmetic number, because the mean of its divisors is an integer number (522979131).

Almost surely, 2^1045958261 is an apocalyptic number.

It is an amenable number.

1045958261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1045958261 is an equidigital number, since it uses as much as digits as its factorization.

1045958261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 86400, while the sum is 41.

The square root of 1045958261 is about 32341.2779741308. The cubic root of 1045958261 is about 1015.0905501330.

The spelling of 1045958261 in words is "one billion, forty-five million, nine hundred fifty-eight thousand, two hundred sixty-one".