2781461 has 4 divisors (see below), whose sum is σ = 2789292. Its totient is φ = 2773632.

The previous prime is 2781451. The next prime is 2781463. The reversal of 2781461 is 1641872.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1168561 + 1612900 = 1081^2 + 1270^2 .

It is a cyclic number.

It is not a de Polignac number, because 2781461 - 2⁶ = 2781397 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2781463) 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, 3356 + ... + 4101.

It is an arithmetic number, because the mean of its divisors is an integer number (697323).

2^2781461 is an apocalyptic number.

It is an amenable number.

2781461 is a deficient number, since it is larger than the sum of its proper divisors (7831).

2781461 is an equidigital number, since it uses as much as digits as its factorization.

2781461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7830.

The product of its digits is 2688, while the sum is 29.

The square root of 2781461 is about 1667.7712672906. The cubic root of 2781461 is about 140.6342144415.

The spelling of 2781461 in words is "two million, seven hundred eighty-one thousand, four hundred sixty-one".