3641491 has 4 divisors (see below), whose sum is σ = 4161712. Its totient is φ = 3121272.

The previous prime is 3641489. The next prime is 3641507. The reversal of 3641491 is 1941463.

3641491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1941463 = 29 ⋅66947.

It is not a de Polignac number, because 3641491 - 2¹ = 3641489 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3641401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 260100 + ... + 260113.

It is an arithmetic number, because the mean of its divisors is an integer number (1040428).

Almost surely, 2^3641491 is an apocalyptic number.

3641491 is a deficient number, since it is larger than the sum of its proper divisors (520221).

3641491 is an equidigital number, since it uses as much as digits as its factorization.

3641491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520220.

The product of its digits is 2592, while the sum is 28.

The square root of 3641491 is about 1908.2691110009. The cubic root of 3641491 is about 153.8484341136.

Subtracting from 3641491 its sum of digits (28), we obtain a palindrome (3641463).

The spelling of 3641491 in words is "three million, six hundred forty-one thousand, four hundred ninety-one".