1255534515 has 24 divisors (see below), whose sum is σ = 2182452480. Its totient is φ = 667713024.

The previous prime is 1255534457. The next prime is 1255534529. The reversal of 1255534515 is 5154355521.

It is not a de Polignac number, because 1255534515 - 2¹⁵ = 1255501747 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1255534515.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23635 + ... + 55404.

It is an arithmetic number, because the mean of its divisors is an integer number (90935520).

Almost surely, 2^1255534515 is an apocalyptic number.

1255534515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1255534515 is a deficient number, since it is larger than the sum of its proper divisors (926917965).

1255534515 is a wasteful number, since it uses less digits than its factorization.

1255534515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79403 (or 79400 counting only the distinct ones).

The product of its digits is 75000, while the sum is 36.

The square root of 1255534515 is about 35433.5224751929. The cubic root of 1255534515 is about 1078.8048378631.

The spelling of 1255534515 in words is "one billion, two hundred fifty-five million, five hundred thirty-four thousand, five hundred fifteen".