1039391 has 8 divisors (see below), whose sum is σ = 1079568. Its totient is φ = 1000000.

The previous prime is 1039387. The next prime is 1039421. The reversal of 1039391 is 1939301.

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

It is a 6-Lehmer number, since φ(1039391) divides (1039391-1)⁶.

It is a cyclic number.

It is not a de Polignac number, because 1039391 - 2² = 1039387 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1039391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1039321) 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, 4016 + ... + 4266.

It is an arithmetic number, because the mean of its divisors is an integer number (134946).

2^1039391 is an apocalyptic number.

1039391 is a deficient number, since it is larger than the sum of its proper divisors (40177).

1039391 is a wasteful number, since it uses less digits than its factorization.

1039391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393.

The product of its (nonzero) digits is 729, while the sum is 26.

The square root of 1039391 is about 1019.5052721786. The cubic root of 1039391 is about 101.2961604284.

The spelling of 1039391 in words is "one million, thirty-nine thousand, three hundred ninety-one".