1965145 has 24 divisors (see below), whose sum is σ = 2958984. Its totient is φ = 1241856.

The previous prime is 1965133. The next prime is 1965167. The reversal of 1965145 is 5415691.

It can be written as a sum of positive squares in 4 ways, for example, as 63504 + 1901641 = 252^2 + 1379^2 .

It is not a de Polignac number, because 1965145 - 2¹³ = 1956953 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2877 + ... + 3493.

It is an arithmetic number, because the mean of its divisors is an integer number (123291).

2^1965145 is an apocalyptic number.

It is an amenable number.

1965145 is a deficient number, since it is larger than the sum of its proper divisors (993839).

1965145 is a wasteful number, since it uses less digits than its factorization.

1965145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649 (or 642 counting only the distinct ones).

The product of its digits is 5400, while the sum is 31.

The square root of 1965145 is about 1401.8362957207. The cubic root of 1965145 is about 125.2559024208.

The spelling of 1965145 in words is "one million, nine hundred sixty-five thousand, one hundred forty-five".