1261885 has 16 divisors (see below), whose sum is σ = 1641600. Its totient is φ = 927936.

The previous prime is 1261861. The next prime is 1261889. The reversal of 1261885 is 5881621.

It is a cyclic number.

It is not a de Polignac number, because 1261885 - 2⁹ = 1261373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1261889) 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, 3336 + ... + 3694.

It is an arithmetic number, because the mean of its divisors is an integer number (102600).

2^1261885 is an apocalyptic number.

It is an amenable number.

1261885 is a deficient number, since it is larger than the sum of its proper divisors (379715).

1261885 is a wasteful number, since it uses less digits than its factorization.

1261885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420.

The product of its digits is 3840, while the sum is 31.

The square root of 1261885 is about 1123.3365479677. The cubic root of 1261885 is about 108.0620642353.

The spelling of 1261885 in words is "one million, two hundred sixty-one thousand, eight hundred eighty-five".