3661465 has 4 divisors (see below), whose sum is σ = 4393764. Its totient is φ = 2929168.

The previous prime is 3661457. The next prime is 3661499. The reversal of 3661465 is 5641663.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5641663 = 1213 ⋅4651.

It can be written as a sum of positive squares in 2 ways, for example, as 2471184 + 1190281 = 1572^2 + 1091^2 .

It is a cyclic number.

It is not a de Polignac number, because 3661465 - 2³ = 3661457 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

3661465 is a lucky number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 366142 + ... + 366151.

It is an arithmetic number, because the mean of its divisors is an integer number (1098441).

Almost surely, 2^3661465 is an apocalyptic number.

It is an amenable number.

3661465 is a deficient number, since it is larger than the sum of its proper divisors (732299).

3661465 is an equidigital number, since it uses as much as digits as its factorization.

3661465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732298.

The product of its digits is 12960, while the sum is 31.

The square root of 3661465 is about 1913.4954925476. The cubic root of 3661465 is about 154.1292135299.

The spelling of 3661465 in words is "three million, six hundred sixty-one thousand, four hundred sixty-five".