1239947 has 4 divisors (see below), whose sum is σ = 1260336. Its totient is φ = 1219560.

The previous prime is 1239943. The next prime is 1239961. The reversal of 1239947 is 7499321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1239947 - 2² = 1239943 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (1239943) 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, 10103 + ... + 10224.

It is an arithmetic number, because the mean of its divisors is an integer number (315084).

2^1239947 is an apocalyptic number.

1239947 is a deficient number, since it is larger than the sum of its proper divisors (20389).

1239947 is an equidigital number, since it uses as much as digits as its factorization.

1239947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20388.

The product of its digits is 13608, while the sum is 35.

The square root of 1239947 is about 1113.5290746092. The cubic root of 1239947 is about 107.4321764356.

The spelling of 1239947 in words is "one million, two hundred thirty-nine thousand, nine hundred forty-seven".