1945895 has 16 divisors (see below), whose sum is σ = 2721600. Its totient is φ = 1307904.

The previous prime is 1945891. The next prime is 1945903. The reversal of 1945895 is 5985491.

1945895 = 131² + 132² + ... + 200².

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1945895 - 2² = 1945891 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1945891) 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, 1331 + ... + 2379.

It is an arithmetic number, because the mean of its divisors is an integer number (170100).

2^1945895 is an apocalyptic number.

1945895 is a deficient number, since it is larger than the sum of its proper divisors (775705).

1945895 is a wasteful number, since it uses less digits than its factorization.

1945895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1114.

The product of its digits is 64800, while the sum is 41.

The square root of 1945895 is about 1394.9534042397. The cubic root of 1945895 is about 124.8455692878.

The spelling of 1945895 in words is "one million, nine hundred forty-five thousand, eight hundred ninety-five".