3650561 has 2 divisors, whose sum is σ = 3650562. Its totient is φ = 3650560.

The previous prime is 3650533. The next prime is 3650567. The reversal of 3650561 is 1650563.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3591025 + 59536 = 1895^2 + 244^2 .

It is an emirp because it is prime and its reverse (1650563) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3650561 - 2⁶ = 3650497 is a prime.

It is a super-2 number, since 2×3650561² = 26653191229442, which contains 22 as substring.

It is a Sophie Germain prime.

It is an Ulam number.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 3650561.

It is not a weakly prime, because it can be changed into another prime (3650567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1825280 + 1825281.

It is an arithmetic number, because the mean of its divisors is an integer number (1825281).

Almost surely, 2^3650561 is an apocalyptic number.

It is an amenable number.

3650561 is a deficient number, since it is larger than the sum of its proper divisors (1).

3650561 is an equidigital number, since it uses as much as digits as its factorization.

3650561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2700, while the sum is 26.

The square root of 3650561 is about 1910.6441322235. The cubic root of 3650561 is about 153.9760602580.

The spelling of 3650561 in words is "three million, six hundred fifty thousand, five hundred sixty-one".