1255399699 has 8 divisors (see below), whose sum is σ = 1286737920. Its totient is φ = 1224396936.

The previous prime is 1255399693. The next prime is 1255399723. The reversal of 1255399699 is 9969935521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1255399699 - 2⁵ = 1255399667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1255399693) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76279 + ... + 91264.

It is an arithmetic number, because the mean of its divisors is an integer number (160842240).

Almost surely, 2^1255399699 is an apocalyptic number.

1255399699 is a deficient number, since it is larger than the sum of its proper divisors (31338221).

1255399699 is a wasteful number, since it uses less digits than its factorization.

1255399699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167729.

The product of its digits is 5904900, while the sum is 58.

The square root of 1255399699 is about 35431.6200448131. The cubic root of 1255399699 is about 1078.7662234039.

The spelling of 1255399699 in words is "one billion, two hundred fifty-five million, three hundred ninety-nine thousand, six hundred ninety-nine".