1438139 has 8 divisors (see below), whose sum is σ = 1505520. Its totient is φ = 1372000.

The previous prime is 1438123. The next prime is 1438159. The reversal of 1438139 is 9318341.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1438139 - 2⁴ = 1438123 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1438109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2684 + ... + 3174.

It is an arithmetic number, because the mean of its divisors is an integer number (188190).

2^1438139 is an apocalyptic number.

1438139 is a deficient number, since it is larger than the sum of its proper divisors (67381).

1438139 is a wasteful number, since it uses less digits than its factorization.

1438139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 621.

The product of its digits is 2592, while the sum is 29.

The square root of 1438139 is about 1199.2243326417. The cubic root of 1438139 is about 112.8756561597.

The spelling of 1438139 in words is "one million, four hundred thirty-eight thousand, one hundred thirty-nine".