1261050785 has 16 divisors (see below), whose sum is σ = 1581970176. Its totient is φ = 963196608.

The previous prime is 1261050779. The next prime is 1261050793. The reversal of 1261050785 is 5870501621.

It is a cyclic number.

It is not a de Polignac number, because 1261050785 - 2¹⁶ = 1260985249 is a prime.

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, 54212 + ... + 73898.

It is an arithmetic number, because the mean of its divisors is an integer number (98873136).

Almost surely, 2^1261050785 is an apocalyptic number.

It is an amenable number.

1261050785 is a deficient number, since it is larger than the sum of its proper divisors (320919391).

1261050785 is a wasteful number, since it uses less digits than its factorization.

1261050785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20272.

The product of its (nonzero) digits is 16800, while the sum is 35.

The square root of 1261050785 is about 35511.2768708758. The cubic root of 1261050785 is about 1080.3824619930.

The spelling of 1261050785 in words is "one billion, two hundred sixty-one million, fifty thousand, seven hundred eighty-five".