1139755 has 4 divisors (see below), whose sum is σ = 1367712. Its totient is φ = 911800.

The previous prime is 1139741. The next prime is 1139771. The reversal of 1139755 is 5579311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5579311 = 643 ⋅8677.

It is not a de Polignac number, because 1139755 - 2¹¹ = 1137707 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

1139755 is a lucky number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113971 + ... + 113980.

It is an arithmetic number, because the mean of its divisors is an integer number (341928).

2^1139755 is an apocalyptic number.

1139755 is a deficient number, since it is larger than the sum of its proper divisors (227957).

1139755 is an equidigital number, since it uses as much as digits as its factorization.

1139755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227956.

The product of its digits is 4725, while the sum is 31.

The square root of 1139755 is about 1067.5930872762. The cubic root of 1139755 is about 104.4569085858.

The spelling of 1139755 in words is "one million, one hundred thirty-nine thousand, seven hundred fifty-five".