1261867 has 4 divisors (see below), whose sum is σ = 1277920. Its totient is φ = 1245816.

The previous prime is 1261861. The next prime is 1261889. The reversal of 1261867 is 7681621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7681621 = 197 ⋅38993.

It is a cyclic number.

It is not a de Polignac number, because 1261867 - 2⁷ = 1261739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1261861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7908 + ... + 8065.

It is an arithmetic number, because the mean of its divisors is an integer number (319480).

2^1261867 is an apocalyptic number.

1261867 is a deficient number, since it is larger than the sum of its proper divisors (16053).

1261867 is an equidigital number, since it uses as much as digits as its factorization.

1261867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16052.

The product of its digits is 4032, while the sum is 31.

The square root of 1261867 is about 1123.3285360926. The cubic root of 1261867 is about 108.0615504203.

The spelling of 1261867 in words is "one million, two hundred sixty-one thousand, eight hundred sixty-seven".