1945566 has 32 divisors (see below), whose sum is σ = 4942080. Its totient is φ = 555768.

The previous prime is 1945561. The next prime is 1945579. The reversal of 1945566 is 6655491.

1945566 is a `hidden beast` number, since 1 + 94 + 5 + 566 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 1945566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1945561) 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, 2196 + ... + 2951.

It is an arithmetic number, because the mean of its divisors is an integer number (154440).

2^1945566 is an apocalyptic number.

1945566 is an abundant number, since it is smaller than the sum of its proper divisors (2996514).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1945566 is a wasteful number, since it uses less digits than its factorization.

1945566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5165 (or 5159 counting only the distinct ones).

The product of its digits is 32400, while the sum is 36.

The square root of 1945566 is about 1394.8354741689. The cubic root of 1945566 is about 124.8385328500.

The spelling of 1945566 in words is "one million, nine hundred forty-five thousand, five hundred sixty-six".