1139905 has 24 divisors (see below), whose sum is σ = 1581120. Its totient is φ = 786240.

The previous prime is 1139869. The next prime is 1139909. The reversal of 1139905 is 5099311.

1139905 = T₆₂ + T₆₃ + ... + T₁₉₁.

It is not a de Polignac number, because 1139905 - 2⁹ = 1139393 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1139909) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16020 + ... + 16090.

It is an arithmetic number, because the mean of its divisors is an integer number (65880).

2^1139905 is an apocalyptic number.

It is an amenable number.

1139905 is a deficient number, since it is larger than the sum of its proper divisors (441215).

1139905 is a wasteful number, since it uses less digits than its factorization.

1139905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121 (or 108 counting only the distinct ones).

The product of its (nonzero) digits is 1215, while the sum is 28.

The square root of 1139905 is about 1067.6633364502. The cubic root of 1139905 is about 104.4614908129.

The spelling of 1139905 in words is "one million, one hundred thirty-nine thousand, nine hundred five".