1149157815 has 16 divisors (see below), whose sum is σ = 1980087648. Its totient is φ = 565739136.

The previous prime is 1149157787. The next prime is 1149157831. The reversal of 1149157815 is 5187519411.

It is not a de Polignac number, because 1149157815 - 2⁵ = 1149157783 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2946364 + ... + 2946753.

It is an arithmetic number, because the mean of its divisors is an integer number (123755478).

Almost surely, 2^1149157815 is an apocalyptic number.

1149157815 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1149157815 is a deficient number, since it is larger than the sum of its proper divisors (830929833).

1149157815 is a wasteful number, since it uses less digits than its factorization.

1149157815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5893138.

The product of its digits is 50400, while the sum is 42.

The square root of 1149157815 is about 33899.2303009965. The cubic root of 1149157815 is about 1047.4337375469.

The spelling of 1149157815 in words is "one billion, one hundred forty-nine million, one hundred fifty-seven thousand, eight hundred fifteen".