2761281 has 6 divisors (see below), whose sum is σ = 3988530. Its totient is φ = 1840848.

The previous prime is 2761279. The next prime is 2761301. The reversal of 2761281 is 1821672.

It can be written as a sum of positive squares in only one way, i.e., 1461681 + 1299600 = 1209^2 + 1140^2 .

It is not a de Polignac number, because 2761281 - 2¹ = 2761279 is a prime.

It is a super-2 number, since 2×2761281² = 15249345521922, which contains 22 as substring.

It is a Curzon number.

2761281 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2761181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 153396 + ... + 153413.

It is an arithmetic number, because the mean of its divisors is an integer number (664755).

2^2761281 is an apocalyptic number.

It is an amenable number.

2761281 is a deficient number, since it is larger than the sum of its proper divisors (1227249).

2761281 is a wasteful number, since it uses less digits than its factorization.

2761281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306815 (or 306812 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 2761281 is about 1661.7102635538. The cubic root of 2761281 is about 140.2932797502.

The spelling of 2761281 in words is "two million, seven hundred sixty-one thousand, two hundred eighty-one".