1138947 has 4 divisors (see below), whose sum is σ = 1518600. Its totient is φ = 759296.

The previous prime is 1138919. The next prime is 1138957. The reversal of 1138947 is 7498311.

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 1138947 - 2⁶ = 1138883 is a prime.

It is a D-number.

1138947 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1138957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 189822 + ... + 189827.

It is an arithmetic number, because the mean of its divisors is an integer number (379650).

2^1138947 is an apocalyptic number.

1138947 is a deficient number, since it is larger than the sum of its proper divisors (379653).

1138947 is an equidigital number, since it uses as much as digits as its factorization.

1138947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379652.

The product of its digits is 6048, while the sum is 33.

The square root of 1138947 is about 1067.2145988507. The cubic root of 1138947 is about 104.4322187373.

The spelling of 1138947 in words is "one million, one hundred thirty-eight thousand, nine hundred forty-seven".