1225247 has 4 divisors (see below), whose sum is σ = 1242576. Its totient is φ = 1207920.

The previous prime is 1225223. The next prime is 1225261. The reversal of 1225247 is 7425221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7425221 = 383 ⋅19387.

It is a cyclic number.

It is not a de Polignac number, because 1225247 - 2⁶ = 1225183 is a prime.

It is a super-2 number, since 2×1225247² = 3002460422018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225297) 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 3 ways as a sum of consecutive naturals, for example, 8558 + ... + 8699.

It is an arithmetic number, because the mean of its divisors is an integer number (310644).

2^1225247 is an apocalyptic number.

1225247 is a deficient number, since it is larger than the sum of its proper divisors (17329).

1225247 is an equidigital number, since it uses as much as digits as its factorization.

1225247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17328.

The product of its digits is 1120, while the sum is 23.

The square root of 1225247 is about 1106.9087586608. The cubic root of 1225247 is about 107.0059390537.

The spelling of 1225247 in words is "one million, two hundred twenty-five thousand, two hundred forty-seven".