6516457 has 4 divisors (see below), whose sum is σ = 6899796. Its totient is φ = 6133120.

The previous prime is 6516439. The next prime is 6516463. The reversal of 6516457 is 7546156.

It is a happy number.

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 5494336 + 1022121 = 2344^2 + 1011^2 .

It is a cyclic number.

It is not a de Polignac number, because 6516457 - 2¹⁵ = 6483689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6516437) 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, 191644 + ... + 191677.

It is an arithmetic number, because the mean of its divisors is an integer number (1724949).

Almost surely, 2^6516457 is an apocalyptic number.

It is an amenable number.

6516457 is a deficient number, since it is larger than the sum of its proper divisors (383339).

6516457 is a wasteful number, since it uses less digits than its factorization.

6516457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383338.

The product of its digits is 25200, while the sum is 34.

The square root of 6516457 is about 2552.7351997416. The cubic root of 6516457 is about 186.7829275038.

The spelling of 6516457 in words is "six million, five hundred sixteen thousand, four hundred fifty-seven".