2159447 has 4 divisors (see below), whose sum is σ = 2253360. Its totient is φ = 2065536.

The previous prime is 2159419. The next prime is 2159449. The reversal of 2159447 is 7449512.

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 2159447 - 2⁶ = 2159383 is a prime.

It is a super-2 number, since 2×2159447² = 9326422691618, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2159449) 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, 46922 + ... + 46967.

It is an arithmetic number, because the mean of its divisors is an integer number (563340).

2^2159447 is an apocalyptic number.

2159447 is a deficient number, since it is larger than the sum of its proper divisors (93913).

2159447 is an equidigital number, since it uses as much as digits as its factorization.

2159447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93912.

The product of its digits is 10080, while the sum is 32.

The square root of 2159447 is about 1469.5056992064. The cubic root of 2159447 is about 129.2550489568.

The spelling of 2159447 in words is "two million, one hundred fifty-nine thousand, four hundred forty-seven".