1213886 has 4 divisors (see below), whose sum is σ = 1820832. Its totient is φ = 606942.

The previous prime is 1213879. The next prime is 1213897. The reversal of 1213886 is 6883121.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a plaindrome in base 13.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 303470 + ... + 303473.

It is an arithmetic number, because the mean of its divisors is an integer number (455208).

2^1213886 is an apocalyptic number.

1213886 is a deficient number, since it is larger than the sum of its proper divisors (606946).

1213886 is an equidigital number, since it uses as much as digits as its factorization.

1213886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606945.

The product of its digits is 2304, while the sum is 29.

The square root of 1213886 is about 1101.7649477089. The cubic root of 1213886 is about 106.6741769886.

The spelling of 1213886 in words is "one million, two hundred thirteen thousand, eight hundred eighty-six".