1115161 has 4 divisors (see below), whose sum is σ = 1117492. Its totient is φ = 1112832.

The previous prime is 1115131. The next prime is 1115189. The reversal of 1115161 is 1615111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1615111 = 383 ⋅4217.

It can be written as a sum of positive squares in 2 ways, for example, as 360000 + 755161 = 600^2 + 869^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1115161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1115131) 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, 156 + ... + 1501.

It is an arithmetic number, because the mean of its divisors is an integer number (279373).

2^1115161 is an apocalyptic number.

It is an amenable number.

1115161 is a deficient number, since it is larger than the sum of its proper divisors (2331).

1115161 is an equidigital number, since it uses as much as digits as its factorization.

1115161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2330.

The product of its digits is 30, while the sum is 16.

The square root of 1115161 is about 1056.0118370549. The cubic root of 1115161 is about 103.7001037472.

The spelling of 1115161 in words is "one million, one hundred fifteen thousand, one hundred sixty-one".