1139426 has 4 divisors (see below), whose sum is σ = 1709142. Its totient is φ = 569712.

The previous prime is 1139423. The next prime is 1139461. The reversal of 1139426 is 6249311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6249311 = 73 ⋅85607.

It can be written as a sum of positive squares in only one way, i.e., 648025 + 491401 = 805^2 + 701^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1139395 and 1139404.

It is not an unprimeable number, because it can be changed into a prime (1139423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 284855 + ... + 284858.

2^1139426 is an apocalyptic number.

1139426 is a deficient number, since it is larger than the sum of its proper divisors (569716).

1139426 is an equidigital number, since it uses as much as digits as its factorization.

1139426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 569715.

The product of its digits is 1296, while the sum is 26.

The square root of 1139426 is about 1067.4389912309. The cubic root of 1139426 is about 104.4468568261.

The spelling of 1139426 in words is "one million, one hundred thirty-nine thousand, four hundred twenty-six".