1255235515 has 4 divisors (see below), whose sum is σ = 1506282624. Its totient is φ = 1004188408.

The previous prime is 1255235479. The next prime is 1255235519. The reversal of 1255235515 is 5155325521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5155325521 = 14867 ⋅346763.

It is a cyclic number.

It is not a de Polignac number, because 1255235515 - 2¹⁵ = 1255202747 is a prime.

It is a super-3 number, since 3×1255235515³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1255235519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125523547 + ... + 125523556.

It is an arithmetic number, because the mean of its divisors is an integer number (376570656).

Almost surely, 2^1255235515 is an apocalyptic number.

1255235515 is a deficient number, since it is larger than the sum of its proper divisors (251047109).

1255235515 is an equidigital number, since it uses as much as digits as its factorization.

1255235515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251047108.

The product of its digits is 37500, while the sum is 34.

The square root of 1255235515 is about 35429.3030555217. The cubic root of 1255235515 is about 1078.7191935282.

The spelling of 1255235515 in words is "one billion, two hundred fifty-five million, two hundred thirty-five thousand, five hundred fifteen".