1138261 has 4 divisors (see below), whose sum is σ = 1144800. Its totient is φ = 1131724.

The previous prime is 1138237. The next prime is 1138273. The reversal of 1138261 is 1628311.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1628311 = 17 ⋅95783.

It is a cyclic number.

It is not a de Polignac number, because 1138261 - 2⁹ = 1137749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1138061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3001 + ... + 3358.

It is an arithmetic number, because the mean of its divisors is an integer number (286200).

2^1138261 is an apocalyptic number.

It is an amenable number.

1138261 is a deficient number, since it is larger than the sum of its proper divisors (6539).

1138261 is an equidigital number, since it uses as much as digits as its factorization.

1138261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6538.

The product of its digits is 288, while the sum is 22.

The square root of 1138261 is about 1066.8931530383. The cubic root of 1138261 is about 104.4112476444.

The spelling of 1138261 in words is "one million, one hundred thirty-eight thousand, two hundred sixty-one".