1245247 has 4 divisors (see below), whose sum is σ = 1250656. Its totient is φ = 1239840.

The previous prime is 1245227. The next prime is 1245281. The reversal of 1245247 is 7425421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7425421 = 29 ⋅256049.

It is a cyclic number.

It is not a de Polignac number, because 1245247 - 2¹⁵ = 1212479 is a prime.

It is a d-powerful number, because it can be written as 1 + 2³ + 4⁸ + 5 + 2¹⁷ + 4¹⁰ + 7² .

It is a Duffinian number.

1245247 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1245217) 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, 2343 + ... + 2824.

It is an arithmetic number, because the mean of its divisors is an integer number (312664).

2^1245247 is an apocalyptic number.

1245247 is a deficient number, since it is larger than the sum of its proper divisors (5409).

1245247 is an equidigital number, since it uses as much as digits as its factorization.

1245247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5408.

The product of its digits is 2240, while the sum is 25.

The square root of 1245247 is about 1115.9063580785. The cubic root of 1245247 is about 107.5850273754.

The spelling of 1245247 in words is "one million, two hundred forty-five thousand, two hundred forty-seven".