6321280261 has 4 divisors (see below), whose sum is σ = 6321451500. Its totient is φ = 6321109024.

The previous prime is 6321280243. The next prime is 6321280271. The reversal of 6321280261 is 1620821236.

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 5313535236 + 1007745025 = 72894^2 + 31745^2 .

It is a cyclic number.

It is not a de Polignac number, because 6321280261 - 2⁹ = 6321279749 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 (6321280201) 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, 4846 + ... + 112543.

It is an arithmetic number, because the mean of its divisors is an integer number (1580362875).

Almost surely, 2^6321280261 is an apocalyptic number.

It is an amenable number.

6321280261 is a deficient number, since it is larger than the sum of its proper divisors (171239).

6321280261 is a wasteful number, since it uses less digits than its factorization.

6321280261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171238.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 6321280261 is about 79506.4793648920. The cubic root of 6321280261 is about 1848.9919281291.

The spelling of 6321280261 in words is "six billion, three hundred twenty-one million, two hundred eighty thousand, two hundred sixty-one".