1255155015 has 16 divisors (see below), whose sum is σ = 2011828608. Its totient is φ = 668222496.

The previous prime is 1255154987. The next prime is 1255155037. The reversal of 1255155015 is 5105515521.

It is not a de Polignac number, because 1255155015 - 2⁵ = 1255154983 is a prime.

It is a super-2 number, since 2×1255155015² = 3150828223359300450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65869 + ... + 82758.

It is an arithmetic number, because the mean of its divisors is an integer number (125739288).

Almost surely, 2^1255155015 is an apocalyptic number.

1255155015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1255155015 is a deficient number, since it is larger than the sum of its proper divisors (756673593).

1255155015 is a wasteful number, since it uses less digits than its factorization.

1255155015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149198.

The product of its (nonzero) digits is 6250, while the sum is 30.

The square root of 1255155015 is about 35428.1669720577. The cubic root of 1255155015 is about 1078.6961331143.

The spelling of 1255155015 in words is "one billion, two hundred fifty-five million, one hundred fifty-five thousand, fifteen".