1155015149 has 16 divisors (see below), whose sum is σ = 1244004480. Its totient is φ = 1069125120.

The previous prime is 1155015133. The next prime is 1155015163. The reversal of 1155015149 is 9415105511.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1155015149 - 2⁴ = 1155015133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155015049) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 148649 + ... + 156225.

It is an arithmetic number, because the mean of its divisors is an integer number (77750280).

Almost surely, 2^1155015149 is an apocalyptic number.

1155015149 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1155015149 is a deficient number, since it is larger than the sum of its proper divisors (88989331).

1155015149 is a wasteful number, since it uses less digits than its factorization.

1155015149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7780.

The product of its (nonzero) digits is 4500, while the sum is 32.

The square root of 1155015149 is about 33985.5138110343. The cubic root of 1155015149 is about 1049.2103356758.

The spelling of 1155015149 in words is "one billion, one hundred fifty-five million, fifteen thousand, one hundred forty-nine".