1243947 has 8 divisors (see below), whose sum is σ = 1697344. Its totient is φ = 809928.

The previous prime is 1243943. The next prime is 1243951. The reversal of 1243947 is 7493421.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1243943) and next prime (1243951).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1243947 - 2² = 1243943 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1243943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4693 + ... + 4950.

It is an arithmetic number, because the mean of its divisors is an integer number (212168).

2^1243947 is an apocalyptic number.

1243947 is a deficient number, since it is larger than the sum of its proper divisors (453397).

1243947 is an equidigital number, since it uses as much as digits as its factorization.

1243947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9689.

The product of its digits is 6048, while the sum is 30.

The square root of 1243947 is about 1115.3237198231. The cubic root of 1243947 is about 107.5475758407.

The spelling of 1243947 in words is "one million, two hundred forty-three thousand, nine hundred forty-seven".