1862161 has 4 divisors (see below), whose sum is σ = 2128192. Its totient is φ = 1596132.

The previous prime is 1862153. The next prime is 1862213. The reversal of 1862161 is 1612681.

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: 1612681 = 7 ⋅230383.

It is a cyclic number.

It is not a de Polignac number, because 1862161 - 2³ = 1862153 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1862101) 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, 133005 + ... + 133018.

It is an arithmetic number, because the mean of its divisors is an integer number (532048).

2^1862161 is an apocalyptic number.

It is an amenable number.

1862161 is a deficient number, since it is larger than the sum of its proper divisors (266031).

1862161 is an equidigital number, since it uses as much as digits as its factorization.

1862161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266030.

The product of its digits is 576, while the sum is 25.

The square root of 1862161 is about 1364.6102007533. The cubic root of 1862161 is about 123.0285037605.

The spelling of 1862161 in words is "one million, eight hundred sixty-two thousand, one hundred sixty-one".