6781261 has 4 divisors (see below), whose sum is σ = 6788224. Its totient is φ = 6774300.

The previous prime is 6781253. The next prime is 6781303. The reversal of 6781261 is 1621876.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 6781261 - 2³ = 6781253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6781231) 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, 1725 + ... + 4066.

It is an arithmetic number, because the mean of its divisors is an integer number (1697056).

Almost surely, 2^6781261 is an apocalyptic number.

It is an amenable number.

6781261 is a deficient number, since it is larger than the sum of its proper divisors (6963).

6781261 is a wasteful number, since it uses less digits than its factorization.

6781261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6962.

The product of its digits is 4032, while the sum is 31.

The square root of 6781261 is about 2604.0854440667. The cubic root of 6781261 is about 189.2794592993.

The spelling of 6781261 in words is "six million, seven hundred eighty-one thousand, two hundred sixty-one".