1161126261 has 12 divisors (see below), whose sum is σ = 1700805600. Its totient is φ = 763181160.

The previous prime is 1161126221. The next prime is 1161126269. The reversal of 1161126261 is 1626211611.

1161126261 is a `hidden beast` number, since 1 + 1 + 611 + 26 + 26 + 1 = 666.

It is not a de Polignac number, because 1161126261 - 2¹³ = 1161118069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161126269) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 907911 + ... + 909188.

It is an arithmetic number, because the mean of its divisors is an integer number (141733800).

Almost surely, 2^1161126261 is an apocalyptic number.

It is an amenable number.

1161126261 is a deficient number, since it is larger than the sum of its proper divisors (539679339).

1161126261 is a wasteful number, since it uses less digits than its factorization.

1161126261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1817176 (or 1817173 counting only the distinct ones).

The product of its digits is 864, while the sum is 27.

The square root of 1161126261 is about 34075.3028012958. The cubic root of 1161126261 is about 1051.0575168678.

Adding to 1161126261 its reverse (1626211611), we get a palindrome (2787337872).

The spelling of 1161126261 in words is "one billion, one hundred sixty-one million, one hundred twenty-six thousand, two hundred sixty-one".