2164567 has 4 divisors (see below), whose sum is σ = 2170000. Its totient is φ = 2159136.

The previous prime is 2164529. The next prime is 2164571. The reversal of 2164567 is 7654612.

It is a happy number.

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 2164567 - 2¹⁵ = 2131799 is a prime.

It is a Duffinian number.

2164567 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2164597) 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, 2067 + ... + 2932.

It is an arithmetic number, because the mean of its divisors is an integer number (542500).

2^2164567 is an apocalyptic number.

2164567 is a deficient number, since it is larger than the sum of its proper divisors (5433).

2164567 is an equidigital number, since it uses as much as digits as its factorization.

2164567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5432.

The product of its digits is 10080, while the sum is 31.

The square root of 2164567 is about 1471.2467502088. The cubic root of 2164567 is about 129.3571219277.

It can be divided in two parts, 21645 and 67, that added together give a palindrome (21712).

The spelling of 2164567 in words is "two million, one hundred sixty-four thousand, five hundred sixty-seven".