2049281 has 4 divisors (see below), whose sum is σ = 2206932. Its totient is φ = 1891632.

The previous prime is 2049269. The next prime is 2049287. The reversal of 2049281 is 1829402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1829402 = 2 ⋅914701.

It can be written as a sum of positive squares in 2 ways, for example, as 1175056 + 874225 = 1084^2 + 935^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2049281 is a prime.

It is a super-2 number, since 2×2049281² = 8399105233922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2049281.

It is not an unprimeable number, because it can be changed into a prime (2049287) 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, 78806 + ... + 78831.

It is an arithmetic number, because the mean of its divisors is an integer number (551733).

2^2049281 is an apocalyptic number.

It is an amenable number.

2049281 is a deficient number, since it is larger than the sum of its proper divisors (157651).

2049281 is a wasteful number, since it uses less digits than its factorization.

2049281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157650.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 2049281 is about 1431.5309986165. The cubic root of 2049281 is about 127.0185559924.

The spelling of 2049281 in words is "two million, forty-nine thousand, two hundred eighty-one".