1139865 has 8 divisors (see below), whose sum is σ = 1823808. Its totient is φ = 607920.

The previous prime is 1139863. The next prime is 1139869. The reversal of 1139865 is 5689311.

1139865 = 65² + 66² + ... + 154².

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

It is not a de Polignac number, because 1139865 - 2¹ = 1139863 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1139861) 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, 37981 + ... + 38010.

It is an arithmetic number, because the mean of its divisors is an integer number (227976).

2^1139865 is an apocalyptic number.

1139865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1139865 is a deficient number, since it is larger than the sum of its proper divisors (683943).

1139865 is an equidigital number, since it uses as much as digits as its factorization.

1139865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75999.

The product of its digits is 6480, while the sum is 33.

The square root of 1139865 is about 1067.6446037891. The cubic root of 1139865 is about 104.4602689250.

The spelling of 1139865 in words is "one million, one hundred thirty-nine thousand, eight hundred sixty-five".