6481257 has 4 divisors (see below), whose sum is σ = 8641680. Its totient is φ = 4320836.

The previous prime is 6481243. The next prime is 6481259. The reversal of 6481257 is 7521846.

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 6481257 - 2¹⁰ = 6480233 is a prime.

It is a D-number.

6481257 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6481259) 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, 1080207 + ... + 1080212.

It is an arithmetic number, because the mean of its divisors is an integer number (2160420).

Almost surely, 2^6481257 is an apocalyptic number.

It is an amenable number.

6481257 is a deficient number, since it is larger than the sum of its proper divisors (2160423).

6481257 is a wasteful number, since it uses less digits than its factorization.

6481257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2160422.

The product of its digits is 13440, while the sum is 33.

The square root of 6481257 is about 2545.8312984171. The cubic root of 6481257 is about 186.4460044891.

The spelling of 6481257 in words is "six million, four hundred eighty-one thousand, two hundred fifty-seven".