1255017842 has 16 divisors (see below), whose sum is σ = 2033953152. Its totient is φ = 577348560.

The previous prime is 1255017791. The next prime is 1255017871. The reversal of 1255017842 is 2487105521.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70634 + ... + 86597.

It is an arithmetic number, because the mean of its divisors is an integer number (127122072).

Almost surely, 2^1255017842 is an apocalyptic number.

1255017842 is a deficient number, since it is larger than the sum of its proper divisors (778935310).

1255017842 is a wasteful number, since it uses less digits than its factorization.

1255017842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157553.

The product of its (nonzero) digits is 22400, while the sum is 35.

The square root of 1255017842 is about 35426.2309877864. The cubic root of 1255017842 is about 1078.6568356109.

The spelling of 1255017842 in words is "one billion, two hundred fifty-five million, seventeen thousand, eight hundred forty-two".