1149822561 has 4 divisors (see below), whose sum is σ = 1533096752. Its totient is φ = 766548372.

The previous prime is 1149822559. The next prime is 1149822571. The reversal of 1149822561 is 1652289411.

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: 1652289411 = 3 ⋅550763137.

It is not a de Polignac number, because 1149822561 - 2¹ = 1149822559 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1149822521) 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, 191637091 + ... + 191637096.

It is an arithmetic number, because the mean of its divisors is an integer number (383274188).

Almost surely, 2^1149822561 is an apocalyptic number.

It is an amenable number.

1149822561 is a deficient number, since it is larger than the sum of its proper divisors (383274191).

1149822561 is an equidigital number, since it uses as much as digits as its factorization.

1149822561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383274190.

The product of its digits is 34560, while the sum is 39.

The square root of 1149822561 is about 33909.0336193764. The cubic root of 1149822561 is about 1047.6356660561.

The spelling of 1149822561 in words is "one billion, one hundred forty-nine million, eight hundred twenty-two thousand, five hundred sixty-one".