1231366 has 8 divisors (see below), whose sum is σ = 1854864. Its totient is φ = 613080.

The previous prime is 1231357. The next prime is 1231379. The reversal of 1231366 is 6631321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 645 + ... + 1696.

It is an arithmetic number, because the mean of its divisors is an integer number (231858).

2^1231366 is an apocalyptic number.

1231366 is a deficient number, since it is larger than the sum of its proper divisors (623498).

1231366 is a wasteful number, since it uses less digits than its factorization.

1231366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2606.

The product of its digits is 648, while the sum is 22.

The square root of 1231366 is about 1109.6693201130. The cubic root of 1231366 is about 107.1837759475.

Adding to 1231366 its reverse (6631321), we get a palindrome (7862687).

The spelling of 1231366 in words is "one million, two hundred thirty-one thousand, three hundred sixty-six".