1285311874 has 16 divisors (see below), whose sum is σ = 2403700416. Its totient is φ = 500770800.

The previous prime is 1285311869. The next prime is 1285311893. The reversal of 1285311874 is 4781135821.

It is a super-2 number, since 2×1285311874² = 3304053226890783752, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4172937 + ... + 4173244.

It is an arithmetic number, because the mean of its divisors is an integer number (150231276).

Almost surely, 2^1285311874 is an apocalyptic number.

1285311874 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1285311874 is a deficient number, since it is larger than the sum of its proper divisors (1118388542).

1285311874 is a wasteful number, since it uses less digits than its factorization.

1285311874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8346201.

The product of its digits is 53760, while the sum is 40.

The square root of 1285311874 is about 35851.2464776331. The cubic root of 1285311874 is about 1087.2669158985.

The spelling of 1285311874 in words is "one billion, two hundred eighty-five million, three hundred eleven thousand, eight hundred seventy-four".