1229947 has 4 divisors (see below), whose sum is σ = 1232496. Its totient is φ = 1227400.

The previous prime is 1229941. The next prime is 1229957. The reversal of 1229947 is 7499221.

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: 7499221 = 277 ⋅27073.

It is a cyclic number.

It is not a de Polignac number, because 1229947 - 2³ = 1229939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1229941) 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, 304 + ... + 1597.

It is an arithmetic number, because the mean of its divisors is an integer number (308124).

2^1229947 is an apocalyptic number.

1229947 is a deficient number, since it is larger than the sum of its proper divisors (2549).

1229947 is an equidigital number, since it uses as much as digits as its factorization.

1229947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2548.

The product of its digits is 9072, while the sum is 34.

The square root of 1229947 is about 1109.0297561382. The cubic root of 1229947 is about 107.1425880205.

The spelling of 1229947 in words is "one million, two hundred twenty-nine thousand, nine hundred forty-seven".