1138726 has 8 divisors (see below), whose sum is σ = 1747944. Its totient is φ = 556080.

The previous prime is 1138717. The next prime is 1138729. The reversal of 1138726 is 6278311.

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

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1138694 and 1138703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1138729) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 6535 + ... + 6706.

It is an arithmetic number, because the mean of its divisors is an integer number (218493).

2^1138726 is an apocalyptic number.

1138726 is a deficient number, since it is larger than the sum of its proper divisors (609218).

1138726 is a wasteful number, since it uses less digits than its factorization.

1138726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13286.

The product of its digits is 2016, while the sum is 28.

The square root of 1138726 is about 1067.1110532648. Note that the first 3 decimals coincide. The cubic root of 1138726 is about 104.4254636635.

The spelling of 1138726 in words is "one million, one hundred thirty-eight thousand, seven hundred twenty-six".