2365921 has 2 divisors, whose sum is σ = 2365922. Its totient is φ = 2365920.

The previous prime is 2365901. The next prime is 2365963. The reversal of 2365921 is 1295632.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1782225 + 583696 = 1335^2 + 764^2 .

It is a cyclic number.

It is not a de Polignac number, because 2365921 - 2¹¹ = 2363873 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2365921.

It is not a weakly prime, because it can be changed into another prime (2365901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1182960 + 1182961.

It is an arithmetic number, because the mean of its divisors is an integer number (1182961).

2^2365921 is an apocalyptic number.

It is an amenable number.

2365921 is a deficient number, since it is larger than the sum of its proper divisors (1).

2365921 is an equidigital number, since it uses as much as digits as its factorization.

2365921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3240, while the sum is 28.

The square root of 2365921 is about 1538.1550637046. The cubic root of 2365921 is about 133.2498553855.

The spelling of 2365921 in words is "two million, three hundred sixty-five thousand, nine hundred twenty-one".