1081389 has 8 divisors (see below), whose sum is σ = 1455520. Its totient is φ = 714096.

The previous prime is 1081369. The next prime is 1081403. The reversal of 1081389 is 9831801.

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

It is not a de Polignac number, because 1081389 - 2⁸ = 1081133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1081369) 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, 1327 + ... + 1980.

It is an arithmetic number, because the mean of its divisors is an integer number (181940).

2^1081389 is an apocalyptic number.

It is an amenable number.

1081389 is a deficient number, since it is larger than the sum of its proper divisors (374131).

1081389 is a wasteful number, since it uses less digits than its factorization.

1081389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3419.

The product of its (nonzero) digits is 1728, while the sum is 30.

The square root of 1081389 is about 1039.8985527444. The cubic root of 1081389 is about 102.6425223391.

The spelling of 1081389 in words is "one million, eighty-one thousand, three hundred eighty-nine".