1213207 has 4 divisors (see below), whose sum is σ = 1277080. Its totient is φ = 1149336.

The previous prime is 1213189. The next prime is 1213213. The reversal of 1213207 is 7023121.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1213207 is a prime.

It is an Ulam number.

It is a Duffinian number.

1213207 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213007) 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, 31908 + ... + 31945.

It is an arithmetic number, because the mean of its divisors is an integer number (319270).

2^1213207 is an apocalyptic number.

1213207 is a deficient number, since it is larger than the sum of its proper divisors (63873).

1213207 is an equidigital number, since it uses as much as digits as its factorization.

1213207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63872.

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 1213207 is about 1101.4567626557. The cubic root of 1213207 is about 106.6542835017.

Adding to 1213207 its reverse (7023121), we get a palindrome (8236328).

The spelling of 1213207 in words is "one million, two hundred thirteen thousand, two hundred seven".