1155257015 has 16 divisors (see below), whose sum is σ = 1601298720. Its totient is φ = 790763520.

The previous prime is 1155256987. The next prime is 1155257063. The reversal of 1155257015 is 5107525511.

It is not a de Polignac number, because 1155257015 - 2⁶ = 1155256951 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 616850 + ... + 618719.

It is an arithmetic number, because the mean of its divisors is an integer number (100081170).

Almost surely, 2^1155257015 is an apocalyptic number.

1155257015 is a deficient number, since it is larger than the sum of its proper divisors (446041705).

1155257015 is a wasteful number, since it uses less digits than its factorization.

1155257015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1235602.

The product of its (nonzero) digits is 8750, while the sum is 32.

The square root of 1155257015 is about 33989.0719938041. The cubic root of 1155257015 is about 1049.2835672104.

The spelling of 1155257015 in words is "one billion, one hundred fifty-five million, two hundred fifty-seven thousand, fifteen".