1161047249 has 4 divisors (see below), whose sum is σ = 1229344164. Its totient is φ = 1092750336.

The previous prime is 1161047233. The next prime is 1161047273. The reversal of 1161047249 is 9427401611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9427401611 = 47 ⋅200583013.

It can be written as a sum of positive squares in 2 ways, for example, as 1008697600 + 152349649 = 31760^2 + 12343^2 .

It is a cyclic number.

It is not a de Polignac number, because 1161047249 - 2⁴ = 1161047233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1161047149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34148432 + ... + 34148465.

It is an arithmetic number, because the mean of its divisors is an integer number (307336041).

Almost surely, 2^1161047249 is an apocalyptic number.

It is an amenable number.

1161047249 is a deficient number, since it is larger than the sum of its proper divisors (68296915).

1161047249 is an equidigital number, since it uses as much as digits as its factorization.

1161047249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68296914.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 1161047249 is about 34074.1434081621. The cubic root of 1161047249 is about 1051.0336756362.

The spelling of 1161047249 in words is "one billion, one hundred sixty-one million, forty-seven thousand, two hundred forty-nine".