3665001 has 4 divisors (see below), whose sum is σ = 4886672. Its totient is φ = 2443332.

The previous prime is 3664963. The next prime is 3665017. The reversal of 3665001 is 1005663.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1005663 = 3 ⋅335221.

It is not a de Polignac number, because 3665001 - 2⁶ = 3664937 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3665041) 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, 610831 + ... + 610836.

It is an arithmetic number, because the mean of its divisors is an integer number (1221668).

Almost surely, 2^3665001 is an apocalyptic number.

It is an amenable number.

3665001 is a deficient number, since it is larger than the sum of its proper divisors (1221671).

3665001 is a wasteful number, since it uses less digits than its factorization.

3665001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1221670.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 3665001 is about 1914.4192330835. The cubic root of 3665001 is about 154.1788134898.

It can be divided in two parts, 3 and 665001, that multiplied together give a triangular number (1995003 = T₁₉₉₇).

The spelling of 3665001 in words is "three million, six hundred sixty-five thousand, one".