1139731 has 4 divisors (see below), whose sum is σ = 1206792. Its totient is φ = 1072672.

The previous prime is 1139717. The next prime is 1139741. The reversal of 1139731 is 1379311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1379311 = 43 ⋅32077.

It is a cyclic number.

It is not a de Polignac number, because 1139731 - 2¹⁷ = 1008659 is a prime.

It is a super-2 number, since 2×1139731² = 2597973504722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1139696 and 1139705.

It is not an unprimeable number, because it can be changed into a prime (1139741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33505 + ... + 33538.

It is an arithmetic number, because the mean of its divisors is an integer number (301698).

2^1139731 is an apocalyptic number.

1139731 is a deficient number, since it is larger than the sum of its proper divisors (67061).

1139731 is an equidigital number, since it uses as much as digits as its factorization.

1139731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67060.

The product of its digits is 567, while the sum is 25.

The square root of 1139731 is about 1067.5818469794. The cubic root of 1139731 is about 104.4561753921.

The spelling of 1139731 in words is "one million, one hundred thirty-nine thousand, seven hundred thirty-one".