3641531 has 4 divisors (see below), whose sum is σ = 3675672. Its totient is φ = 3607392.

The previous prime is 3641509. The next prime is 3641537. The reversal of 3641531 is 1351463.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1351463 = 103 ⋅13121.

It is a cyclic number.

It is not a de Polignac number, because 3641531 - 2⁶ = 3641467 is a prime.

It is a super-2 number, since 2×3641531² = 26521496047922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3641497 and 3641506.

It is not an unprimeable number, because it can be changed into a prime (3641537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16910 + ... + 17123.

It is an arithmetic number, because the mean of its divisors is an integer number (918918).

Almost surely, 2^3641531 is an apocalyptic number.

3641531 is a deficient number, since it is larger than the sum of its proper divisors (34141).

3641531 is a wasteful number, since it uses less digits than its factorization.

3641531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34140.

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

The square root of 3641531 is about 1908.2795916741. The cubic root of 3641531 is about 153.8489974282.

Adding to 3641531 its reverse (1351463), we get a palindrome (4992994).

The spelling of 3641531 in words is "three million, six hundred forty-one thousand, five hundred thirty-one".