1438147 has 4 divisors (see below), whose sum is σ = 1441800. Its totient is φ = 1434496.

The previous prime is 1438123. The next prime is 1438159. The reversal of 1438147 is 7418341.

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-1438147 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1438117) 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, 1153 + ... + 2050.

It is an arithmetic number, because the mean of its divisors is an integer number (360450).

2^1438147 is an apocalyptic number.

1438147 is a deficient number, since it is larger than the sum of its proper divisors (3653).

1438147 is an equidigital number, since it uses as much as digits as its factorization.

1438147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3652.

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

The square root of 1438147 is about 1199.2276681264. The cubic root of 1438147 is about 112.8758654588.

The spelling of 1438147 in words is "one million, four hundred thirty-eight thousand, one hundred forty-seven".