6457561 has 4 divisors (see below), whose sum is σ = 7044624. Its totient is φ = 5870500.

The previous prime is 6457553. The next prime is 6457589. The reversal of 6457561 is 1657546.

It is a happy number.

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 6457561 - 2³ = 6457553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6457531) 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, 293515 + ... + 293536.

It is an arithmetic number, because the mean of its divisors is an integer number (1761156).

Almost surely, 2^6457561 is an apocalyptic number.

It is an amenable number.

6457561 is a deficient number, since it is larger than the sum of its proper divisors (587063).

6457561 is a wasteful number, since it uses less digits than its factorization.

6457561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 587062.

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

The square root of 6457561 is about 2541.1731542734. The cubic root of 6457561 is about 186.2185064537.

The spelling of 6457561 in words is "six million, four hundred fifty-seven thousand, five hundred sixty-one".