1138447 has 4 divisors (see below), whose sum is σ = 1166256. Its totient is φ = 1110640.

The previous prime is 1138441. The next prime is 1138451. The reversal of 1138447 is 7448311.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1138447 is a prime.

It is a Duffinian number.

1138447 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1138441) 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, 13843 + ... + 13924.

It is an arithmetic number, because the mean of its divisors is an integer number (291564).

2^1138447 is an apocalyptic number.

1138447 is a deficient number, since it is larger than the sum of its proper divisors (27809).

1138447 is an equidigital number, since it uses as much as digits as its factorization.

1138447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27808.

The product of its digits is 2688, while the sum is 28.

The square root of 1138447 is about 1066.9803184689. The cubic root of 1138447 is about 104.4169345165.

The spelling of 1138447 in words is "one million, one hundred thirty-eight thousand, four hundred forty-seven".