2081279 has 4 divisors (see below), whose sum is σ = 2190840. Its totient is φ = 1971720.

The previous prime is 2081273. The next prime is 2081281. The reversal of 2081279 is 9721802.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9721802 = 2 ⋅4860901.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2081279 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2081273) 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, 54752 + ... + 54789.

It is an arithmetic number, because the mean of its divisors is an integer number (547710).

2^2081279 is an apocalyptic number.

2081279 is a deficient number, since it is larger than the sum of its proper divisors (109561).

2081279 is a wasteful number, since it uses less digits than its factorization.

2081279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109560.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 2081279 is about 1442.6638555117. The cubic root of 2081279 is about 127.6762447925.

The spelling of 2081279 in words is "two million, eighty-one thousand, two hundred seventy-nine".