1165461261 has 16 divisors (see below), whose sum is σ = 1600819008. Its totient is φ = 753667200.

The previous prime is 1165461239. The next prime is 1165461263. The reversal of 1165461261 is 1621645611.

It is not a de Polignac number, because 1165461261 - 2⁵ = 1165461229 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1165461263) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20881 + ... + 52601.

It is an arithmetic number, because the mean of its divisors is an integer number (100051188).

Almost surely, 2^1165461261 is an apocalyptic number.

It is an amenable number.

1165461261 is a deficient number, since it is larger than the sum of its proper divisors (435357747).

1165461261 is a wasteful number, since it uses less digits than its factorization.

1165461261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32092.

The product of its digits is 8640, while the sum is 33.

The square root of 1165461261 is about 34138.8526608613. The cubic root of 1165461261 is about 1052.3639139258.

The spelling of 1165461261 in words is "one billion, one hundred sixty-five million, four hundred sixty-one thousand, two hundred sixty-one".