6581481 has 4 divisors (see below), whose sum is σ = 8775312. Its totient is φ = 4387652.

The previous prime is 6581447. The next prime is 6581483. The reversal of 6581481 is 1841856.

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.

It is a cyclic number.

It is not a de Polignac number, because 6581481 - 2¹⁸ = 6319337 is a prime.

It is a super-2 number, since 2×6581481² = 86631784306722, which contains 22 as substring.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (6581483) 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, 1096911 + ... + 1096916.

It is an arithmetic number, because the mean of its divisors is an integer number (2193828).

Almost surely, 2^6581481 is an apocalyptic number.

It is an amenable number.

6581481 is a deficient number, since it is larger than the sum of its proper divisors (2193831).

6581481 is a wasteful number, since it uses less digits than its factorization.

6581481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2193830.

The product of its digits is 7680, while the sum is 33.

The square root of 6581481 is about 2565.4397283897. The cubic root of 6581481 is about 187.4021391551.

The spelling of 6581481 in words is "six million, five hundred eighty-one thousand, four hundred eighty-one".