1161254441 has 4 divisors (see below), whose sum is σ = 1161432912. Its totient is φ = 1161075972.

The previous prime is 1161254359. The next prime is 1161254443. The reversal of 1161254441 is 1444521611.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1444521611 = 13 ⋅111117047.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1161254441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1161254443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79091 + ... + 92616.

It is an arithmetic number, because the mean of its divisors is an integer number (290358228).

Almost surely, 2^1161254441 is an apocalyptic number.

It is an amenable number.

1161254441 is a deficient number, since it is larger than the sum of its proper divisors (178471).

1161254441 is an equidigital number, since it uses as much as digits as its factorization.

1161254441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178470.

The product of its digits is 3840, while the sum is 29.

The square root of 1161254441 is about 34077.1835837412. The cubic root of 1161254441 is about 1051.0961918451.

The spelling of 1161254441 in words is "one billion, one hundred sixty-one million, two hundred fifty-four thousand, four hundred forty-one".