1213247 has 8 divisors (see below), whose sum is σ = 1431552. Its totient is φ = 1006200.

The previous prime is 1213241. The next prime is 1213253. The reversal of 1213247 is 7423121.

It is an interprime number because it is at equal distance from previous prime (1213241) and next prime (1213253).

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 1213247 - 2⁶ = 1213183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213241) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 2579 + ... + 3012.

It is an arithmetic number, because the mean of its divisors is an integer number (178944).

2^1213247 is an apocalyptic number.

1213247 is a deficient number, since it is larger than the sum of its proper divisors (218305).

1213247 is an equidigital number, since it uses as much as digits as its factorization.

1213247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5629.

The product of its digits is 336, while the sum is 20.

The square root of 1213247 is about 1101.4749202774. The cubic root of 1213247 is about 106.6554556360.

Adding to 1213247 its reverse (7423121), we get a palindrome (8636368).

The spelling of 1213247 in words is "one million, two hundred thirteen thousand, two hundred forty-seven".