3641561 has 8 divisors (see below), whose sum is σ = 4540224. Its totient is φ = 2837520.

The previous prime is 3641551. The next prime is 3641563. The reversal of 3641561 is 1651463.

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

It is not a de Polignac number, because 3641561 - 2¹⁰ = 3640537 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3641561.

It is not an unprimeable number, because it can be changed into a prime (3641563) 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, 23570 + ... + 23723.

It is an arithmetic number, because the mean of its divisors is an integer number (567528).

Almost surely, 2^3641561 is an apocalyptic number.

It is an amenable number.

3641561 is a deficient number, since it is larger than the sum of its proper divisors (898663).

3641561 is a wasteful number, since it uses less digits than its factorization.

3641561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47311.

The product of its digits is 2160, while the sum is 26.

The square root of 3641561 is about 1908.2874521413. The cubic root of 3641561 is about 153.8494199114.

The spelling of 3641561 in words is "three million, six hundred forty-one thousand, five hundred sixty-one".