2162491 has 4 divisors (see below), whose sum is σ = 2170800. Its totient is φ = 2154184.

The previous prime is 2162449. The next prime is 2162497. The reversal of 2162491 is 1942612.

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

It is a cyclic number.

It is not a de Polignac number, because 2162491 - 2¹¹ = 2160443 is a prime.

It is a Duffinian number.

2162491 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2162497) 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, 3751 + ... + 4288.

It is an arithmetic number, because the mean of its divisors is an integer number (542700).

2^2162491 is an apocalyptic number.

2162491 is a deficient number, since it is larger than the sum of its proper divisors (8309).

2162491 is an equidigital number, since it uses as much as digits as its factorization.

2162491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8308.

The product of its digits is 864, while the sum is 25.

The square root of 2162491 is about 1470.5410568903. The cubic root of 2162491 is about 129.3157539492.

The spelling of 2162491 in words is "two million, one hundred sixty-two thousand, four hundred ninety-one".