1906564 has 12 divisors (see below), whose sum is σ = 3639888. Its totient is φ = 866600.

The previous prime is 1906559. The next prime is 1906579. The reversal of 1906564 is 4656091.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21622 + ... + 21709.

It is an arithmetic number, because the mean of its divisors is an integer number (303324).

2^1906564 is an apocalyptic number.

It is an amenable number.

1906564 is a deficient number, since it is larger than the sum of its proper divisors (1733324).

1906564 is a wasteful number, since it uses less digits than its factorization.

1906564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43346 (or 43344 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 1906564 is about 1380.7838353631. The cubic root of 1906564 is about 123.9986992579.

The spelling of 1906564 in words is "one million, nine hundred six thousand, five hundred sixty-four".