1138161 has 4 divisors (see below), whose sum is σ = 1517552. Its totient is φ = 758772.

The previous prime is 1138147. The next prime is 1138171. The reversal of 1138161 is 1618311.

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.

It is not a de Polignac number, because 1138161 - 2⁶ = 1138097 is a prime.

It is a D-number.

It is a Duffinian number.

1138161 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1138141) 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, 189691 + ... + 189696.

It is an arithmetic number, because the mean of its divisors is an integer number (379388).

2^1138161 is an apocalyptic number.

It is an amenable number.

1138161 is a deficient number, since it is larger than the sum of its proper divisors (379391).

1138161 is an equidigital number, since it uses as much as digits as its factorization.

1138161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379390.

The product of its digits is 144, while the sum is 21.

The square root of 1138161 is about 1066.8462869598. The cubic root of 1138161 is about 104.4081899302.

The spelling of 1138161 in words is "one million, one hundred thirty-eight thousand, one hundred sixty-one".