1138541 has 4 divisors (see below), whose sum is σ = 1205532. Its totient is φ = 1071552.

The previous prime is 1138519. The next prime is 1138547. The reversal of 1138541 is 1458311.

1138541 = 754² + 755².

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 570025 + 568516 = 755^2 + 754^2 .

It is a cyclic number.

It is not a de Polignac number, because 1138541 - 2¹⁴ = 1122157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1138547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33470 + ... + 33503.

It is an arithmetic number, because the mean of its divisors is an integer number (301383).

2^1138541 is an apocalyptic number.

1138541 is the 755-th centered square number.

It is an amenable number.

1138541 is a deficient number, since it is larger than the sum of its proper divisors (66991).

1138541 is an equidigital number, since it uses as much as digits as its factorization.

1138541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66990.

The product of its digits is 480, while the sum is 23.

The square root of 1138541 is about 1067.0243671070. The cubic root of 1138541 is about 104.4198082916.

The spelling of 1138541 in words is "one million, one hundred thirty-eight thousand, five hundred forty-one".