6437561 has 16 divisors (see below), whose sum is σ = 7425600. Its totient is φ = 5531328.

The previous prime is 6437551. The next prime is 6437567. The reversal of 6437561 is 1657346.

It is a cyclic number.

It is not a de Polignac number, because 6437561 - 2²² = 2243257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6437567) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16355 + ... + 16743.

It is an arithmetic number, because the mean of its divisors is an integer number (464100).

Almost surely, 2^6437561 is an apocalyptic number.

It is an amenable number.

6437561 is a deficient number, since it is larger than the sum of its proper divisors (988039).

6437561 is a wasteful number, since it uses less digits than its factorization.

6437561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488.

The product of its digits is 15120, while the sum is 32.

The square root of 6437561 is about 2537.2349122618. The cubic root of 6437561 is about 186.0260590922.

The spelling of 6437561 in words is "six million, four hundred thirty-seven thousand, five hundred sixty-one".