3643261 has 8 divisors (see below), whose sum is σ = 3755840. Its totient is φ = 3532032.

The previous prime is 3643217. The next prime is 3643267. The reversal of 3643261 is 1623463.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3643261 - 2¹³ = 3635069 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 (3643267) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8080 + ... + 8518.

It is an arithmetic number, because the mean of its divisors is an integer number (469480).

Almost surely, 2^3643261 is an apocalyptic number.

It is an amenable number.

3643261 is a deficient number, since it is larger than the sum of its proper divisors (112579).

3643261 is a wasteful number, since it uses less digits than its factorization.

3643261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 675.

The product of its digits is 2592, while the sum is 25.

The square root of 3643261 is about 1908.7328257250. The cubic root of 3643261 is about 153.8733568371.

The spelling of 3643261 in words is "three million, six hundred forty-three thousand, two hundred sixty-one".