1255994515 has 4 divisors (see below), whose sum is σ = 1507193424. Its totient is φ = 1004795608.

The previous prime is 1255994513. The next prime is 1255994539. The reversal of 1255994515 is 5154995521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1255994515 - 2¹ = 1255994513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1255994513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125599447 + ... + 125599456.

It is an arithmetic number, because the mean of its divisors is an integer number (376798356).

Almost surely, 2^1255994515 is an apocalyptic number.

1255994515 is a deficient number, since it is larger than the sum of its proper divisors (251198909).

1255994515 is an equidigital number, since it uses as much as digits as its factorization.

1255994515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251198908.

The product of its digits is 405000, while the sum is 46.

The square root of 1255994515 is about 35440.0129091399. The cubic root of 1255994515 is about 1078.9365718316.

The spelling of 1255994515 in words is "one billion, two hundred fifty-five million, nine hundred ninety-four thousand, five hundred fifteen".