1139205 has 16 divisors (see below), whose sum is σ = 1837440. Its totient is φ = 602688.

The previous prime is 1139197. The next prime is 1139227. The reversal of 1139205 is 5029311.

It is not a de Polignac number, because 1139205 - 2³ = 1139197 is a prime.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2376 + ... + 2814.

It is an arithmetic number, because the mean of its divisors is an integer number (114840).

2^1139205 is an apocalyptic number.

1139205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1139205 is a deficient number, since it is larger than the sum of its proper divisors (698235).

1139205 is a wasteful number, since it uses less digits than its factorization.

1139205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620.

The product of its (nonzero) digits is 270, while the sum is 21.

The square root of 1139205 is about 1067.3354674141. The cubic root of 1139205 is about 104.4401036457.

The spelling of 1139205 in words is "one million, one hundred thirty-nine thousand, two hundred five".