1031161265 has 16 divisors (see below), whose sum is σ = 1355363280. Its totient is φ = 749629440.

The previous prime is 1031161259. The next prime is 1031161279. The reversal of 1031161265 is 5621611301.

It can be written as a sum of positive squares in 8 ways, for example, as 106028209 + 925133056 = 10297^2 + 30416^2 .

It is not a de Polignac number, because 1031161265 - 2⁴ = 1031161249 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 206696 + ... + 211625.

It is an arithmetic number, because the mean of its divisors is an integer number (84710205).

Almost surely, 2^1031161265 is an apocalyptic number.

It is an amenable number.

1031161265 is a deficient number, since it is larger than the sum of its proper divisors (324202015).

1031161265 is a wasteful number, since it uses less digits than its factorization.

1031161265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418372.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 1031161265 is about 32111.6998148650. The cubic root of 1031161265 is about 1010.2810265924.

Adding to 1031161265 its reverse (5621611301), we get a palindrome (6652772566).

The spelling of 1031161265 in words is "one billion, thirty-one million, one hundred sixty-one thousand, two hundred sixty-five".