1965243 has 24 divisors (see below), whose sum is σ = 3160080. Its totient is φ = 1081920.

The previous prime is 1965239. The next prime is 1965247. The reversal of 1965243 is 3425691.

It is an interprime number because it is at equal distance from previous prime (1965239) and next prime (1965247).

It is not a de Polignac number, because 1965243 - 2² = 1965239 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1965243.

It is not an unprimeable number, because it can be changed into a prime (1965247) 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, 4033 + ... + 4493.

It is an arithmetic number, because the mean of its divisors is an integer number (131670).

2^1965243 is an apocalyptic number.

1965243 is a deficient number, since it is larger than the sum of its proper divisors (1194837).

1965243 is a wasteful number, since it uses less digits than its factorization.

1965243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507 (or 500 counting only the distinct ones).

The product of its digits is 6480, while the sum is 30.

The square root of 1965243 is about 1401.8712494377. The cubic root of 1965243 is about 125.2579845189.

The spelling of 1965243 in words is "one million, nine hundred sixty-five thousand, two hundred forty-three".