1957865 has 24 divisors (see below), whose sum is σ = 2916288. Its totient is φ = 1235520.

The previous prime is 1957861. The next prime is 1957871. The reversal of 1957865 is 5687591.

It is not a de Polignac number, because 1957865 - 2² = 1957861 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1957861) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5750 + ... + 6080.

It is an arithmetic number, because the mean of its divisors is an integer number (121512).

2^1957865 is an apocalyptic number.

It is an amenable number.

1957865 is a deficient number, since it is larger than the sum of its proper divisors (958423).

1957865 is a wasteful number, since it uses less digits than its factorization.

1957865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369 (or 356 counting only the distinct ones).

The product of its digits is 75600, while the sum is 41.

The square root of 1957865 is about 1399.2372922417. The cubic root of 1957865 is about 125.1010383081.

The spelling of 1957865 in words is "one million, nine hundred fifty-seven thousand, eight hundred sixty-five".