1213249 has 4 divisors (see below), whose sum is σ = 1220436. Its totient is φ = 1206064.

The previous prime is 1213241. The next prime is 1213253. The reversal of 1213249 is 9423121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9423121 = 229 ⋅41149.

It can be written as a sum of positive squares in 2 ways, for example, as 1065024 + 148225 = 1032^2 + 385^2 .

It is a cyclic number.

It is not a de Polignac number, because 1213249 - 2³ = 1213241 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian 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 (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3334 + ... + 3679.

It is an arithmetic number, because the mean of its divisors is an integer number (305109).

2^1213249 is an apocalyptic number.

It is an amenable number.

1213249 is a deficient number, since it is larger than the sum of its proper divisors (7187).

1213249 is an equidigital number, since it uses as much as digits as its factorization.

1213249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7186.

The product of its digits is 432, while the sum is 22.

The square root of 1213249 is about 1101.4758281506. The cubic root of 1213249 is about 106.6555142420.

It can be divided in two parts, 121 and 3249, that multiplied together give a square (393129 = 627²).

The spelling of 1213249 in words is "one million, two hundred thirteen thousand, two hundred forty-nine".