1261313834 has 16 divisors (see below), whose sum is σ = 2075505120. Its totient is φ = 570119760.

The previous prime is 1261313819. The next prime is 1261313843. The reversal of 1261313834 is 4383131621.

It is a self number, because there is not a number n which added to its sum of digits gives 1261313834.

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, 156209 + ... + 164084.

It is an arithmetic number, because the mean of its divisors is an integer number (129719070).

Almost surely, 2^1261313834 is an apocalyptic number.

1261313834 is a deficient number, since it is larger than the sum of its proper divisors (814191286).

1261313834 is a wasteful number, since it uses less digits than its factorization.

1261313834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320485.

The product of its digits is 10368, while the sum is 32.

The square root of 1261313834 is about 35514.9804167199. The cubic root of 1261313834 is about 1080.4575775954.

The spelling of 1261313834 in words is "one billion, two hundred sixty-one million, three hundred thirteen thousand, eight hundred thirty-four".