1945565 has 16 divisors (see below), whose sum is σ = 2529792. Its totient is φ = 1430784.

The previous prime is 1945561. The next prime is 1945579. The reversal of 1945565 is 5655491.

It is a cyclic number.

It is not a de Polignac number, because 1945565 - 2² = 1945561 is a prime.

It is a Duffinian number.

It is a Curzon number.

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, 3752 + ... + 4238.

It is an arithmetic number, because the mean of its divisors is an integer number (158112).

2^1945565 is an apocalyptic number.

It is an amenable number.

1945565 is a deficient number, since it is larger than the sum of its proper divisors (584227).

1945565 is a wasteful number, since it uses less digits than its factorization.

1945565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 556.

The product of its digits is 27000, while the sum is 35.

The square root of 1945565 is about 1394.8351157036. The cubic root of 1945565 is about 124.8385114615.

The spelling of 1945565 in words is "one million, nine hundred forty-five thousand, five hundred sixty-five".