1148561091 has 6 divisors (see below), whose sum is σ = 1659032700. Its totient is φ = 765707388.

The previous prime is 1148561087. The next prime is 1148561111. The reversal of 1148561091 is 1901658411.

It is a happy number.

1148561091 is a `hidden beast` number, since 1 + 1 + 4 + 8 + 561 + 0 + 91 = 666.

It is not a de Polignac number, because 1148561091 - 2² = 1148561087 is a prime.

It is a super-2 number, since 2×1148561091² = 2638385159518220562, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1148541091) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 63808941 + ... + 63808958.

It is an arithmetic number, because the mean of its divisors is an integer number (276505450).

Almost surely, 2^1148561091 is an apocalyptic number.

1148561091 is a deficient number, since it is larger than the sum of its proper divisors (510471609).

1148561091 is a wasteful number, since it uses less digits than its factorization.

1148561091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127617905 (or 127617902 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 36.

The square root of 1148561091 is about 33890.4277193428. The cubic root of 1148561091 is about 1047.2524056013.

The spelling of 1148561091 in words is "one billion, one hundred forty-eight million, five hundred sixty-one thousand, ninety-one".