1261681674 has 32 divisors (see below), whose sum is σ = 2765836800. Its totient is φ = 380511600.

The previous prime is 1261681669. The next prime is 1261681693. The reversal of 1261681674 is 4761861621.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31374 + ... + 59225.

It is an arithmetic number, because the mean of its divisors is an integer number (86432400).

Almost surely, 2^1261681674 is an apocalyptic number.

1261681674 is an abundant number, since it is smaller than the sum of its proper divisors (1504155126).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1261681674 is a wasteful number, since it uses less digits than its factorization.

1261681674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90826.

The product of its digits is 96768, while the sum is 42.

The square root of 1261681674 is about 35520.1586989698. The cubic root of 1261681674 is about 1080.5625995378.

The spelling of 1261681674 in words is "one billion, two hundred sixty-one million, six hundred eighty-one thousand, six hundred seventy-four".