3642591 has 4 divisors (see below), whose sum is σ = 4856792. Its totient is φ = 2428392.

The previous prime is 3642581. The next prime is 3642619. The reversal of 3642591 is 1952463.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1952463 = 3 ⋅650821.

It is not a de Polignac number, because 3642591 - 2⁵ = 3642559 is a prime.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3642571) 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, 607096 + ... + 607101.

It is an arithmetic number, because the mean of its divisors is an integer number (1214198).

Almost surely, 2^3642591 is an apocalyptic number.

3642591 is a deficient number, since it is larger than the sum of its proper divisors (1214201).

3642591 is a wasteful number, since it uses less digits than its factorization.

3642591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1214200.

The product of its digits is 6480, while the sum is 30.

The square root of 3642591 is about 1908.5573085449. The cubic root of 3642591 is about 153.8639237615.

The spelling of 3642591 in words is "three million, six hundred forty-two thousand, five hundred ninety-one".