1084139 has 4 divisors (see below), whose sum is σ = 1239024. Its totient is φ = 929256.

The previous prime is 1084133. The next prime is 1084147. The reversal of 1084139 is 9314801.

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 1084139 - 2¹² = 1080043 is a prime.

It is a super-4 number, since 4×1084139⁴ (a number of 25 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1084133) 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, 77432 + ... + 77445.

It is an arithmetic number, because the mean of its divisors is an integer number (309756).

2^1084139 is an apocalyptic number.

1084139 is a deficient number, since it is larger than the sum of its proper divisors (154885).

1084139 is an equidigital number, since it uses as much as digits as its factorization.

1084139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154884.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 1084139 is about 1041.2199575498. The cubic root of 1084139 is about 102.7294562125.

The spelling of 1084139 in words is "one million, eighty-four thousand, one hundred thirty-nine".