1965517 has 2 divisors, whose sum is σ = 1965518. Its totient is φ = 1965516.

The previous prime is 1965503. The next prime is 1965521. The reversal of 1965517 is 7155691.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1920996 + 44521 = 1386^2 + 211^2 .

It is a cyclic number.

It is not a de Polignac number, because 1965517 - 2⁷ = 1965389 is a prime.

1965517 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1965527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 982758 + 982759.

It is an arithmetic number, because the mean of its divisors is an integer number (982759).

2^1965517 is an apocalyptic number.

It is an amenable number.

1965517 is a deficient number, since it is larger than the sum of its proper divisors (1).

1965517 is an equidigital number, since it uses as much as digits as its factorization.

1965517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9450, while the sum is 34.

The square root of 1965517 is about 1401.9689725525. The cubic root of 1965517 is about 125.2638055282.

It can be divided in two parts, 19 and 65517, that added together give a 16-th power (65536 = 2¹⁶).

The spelling of 1965517 in words is "one million, nine hundred sixty-five thousand, five hundred seventeen".