1213705 has 8 divisors (see below), whose sum is σ = 1478592. Its totient is φ = 956208.

The previous prime is 1213673. The next prime is 1213721. The reversal of 1213705 is 5073121.

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

It is a cyclic number.

It is not a de Polignac number, because 1213705 - 2⁵ = 1213673 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1477 + ... + 2146.

It is an arithmetic number, because the mean of its divisors is an integer number (184824).

2^1213705 is an apocalyptic number.

It is an amenable number.

1213705 is a deficient number, since it is larger than the sum of its proper divisors (264887).

1213705 is an equidigital number, since it uses as much as digits as its factorization.

1213705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3695.

The product of its (nonzero) digits is 210, while the sum is 19.

The square root of 1213705 is about 1101.6828037144. The cubic root of 1213705 is about 106.6688747373.

Adding to 1213705 its reverse (5073121), we get a palindrome (6286826).

The spelling of 1213705 in words is "one million, two hundred thirteen thousand, seven hundred five".