2951281 has 4 divisors (see below), whose sum is σ = 2955172. Its totient is φ = 2947392.

The previous prime is 2951279. The next prime is 2951287. The reversal of 2951281 is 1821592.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 2509056 + 442225 = 1584^2 + 665^2 .

It is a cyclic number.

It is not a de Polignac number, because 2951281 - 2¹ = 2951279 is a prime.

It is a super-2 number, since 2×2951281² = 17420119081922, 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 (2951287) 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, 396 + ... + 2461.

It is an arithmetic number, because the mean of its divisors is an integer number (738793).

2^2951281 is an apocalyptic number.

It is an amenable number.

2951281 is a deficient number, since it is larger than the sum of its proper divisors (3891).

2951281 is a wasteful number, since it uses less digits than its factorization.

2951281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3890.

The product of its digits is 1440, while the sum is 28.

The square root of 2951281 is about 1717.9292767748. The cubic root of 2951281 is about 143.4399705212.

The spelling of 2951281 in words is "two million, nine hundred fifty-one thousand, two hundred eighty-one".