3645311 has 4 divisors (see below), whose sum is σ = 3649224. Its totient is φ = 3641400.

The previous prime is 3645307. The next prime is 3645347. The reversal of 3645311 is 1135463.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1135463 = 7 ⋅162209.

It is a cyclic number.

It is not a de Polignac number, because 3645311 - 2² = 3645307 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3645371) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 341 + ... + 2721.

It is an arithmetic number, because the mean of its divisors is an integer number (912306).

Almost surely, 2^3645311 is an apocalyptic number.

3645311 is a deficient number, since it is larger than the sum of its proper divisors (3913).

3645311 is a wasteful number, since it uses less digits than its factorization.

3645311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3912.

The product of its digits is 1080, while the sum is 23.

The square root of 3645311 is about 1909.2697556920. The cubic root of 3645311 is about 153.9022120519.

The spelling of 3645311 in words is "three million, six hundred forty-five thousand, three hundred eleven".