1261771 has 16 divisors (see below), whose sum is σ = 1555200. Its totient is φ = 999648.

The previous prime is 1261769. The next prime is 1261789. The reversal of 1261771 is 1771621.

It is a cyclic number.

It is not a de Polignac number, because 1261771 - 2¹ = 1261769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1261721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6960 + ... + 7138.

It is an arithmetic number, because the mean of its divisors is an integer number (97200).

2^1261771 is an apocalyptic number.

1261771 is a deficient number, since it is larger than the sum of its proper divisors (293429).

1261771 is a wasteful number, since it uses less digits than its factorization.

1261771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258.

The product of its digits is 588, while the sum is 25.

The square root of 1261771 is about 1123.2858051271. The cubic root of 1261771 is about 108.0588099910.

The spelling of 1261771 in words is "one million, two hundred sixty-one thousand, seven hundred seventy-one".