3611621 has 16 divisors (see below), whose sum is σ = 4161024. Its totient is φ = 3108864.

The previous prime is 3611603. The next prime is 3611623. The reversal of 3611621 is 1261163.

It is not a de Polignac number, because 3611621 - 2¹⁰ = 3610597 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 3611593 and 3611602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3611623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13925 + ... + 14181.

It is an arithmetic number, because the mean of its divisors is an integer number (260064).

Almost surely, 2^3611621 is an apocalyptic number.

It is an amenable number.

3611621 is a deficient number, since it is larger than the sum of its proper divisors (549403).

3611621 is a wasteful number, since it uses less digits than its factorization.

3611621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340.

The product of its digits is 216, while the sum is 20.

The square root of 3611621 is about 1900.4265310714. The cubic root of 3611621 is about 153.4266219753.

Adding to 3611621 its reverse (1261163), we get a palindrome (4872784).

It can be divided in two parts, 361162 and 1, that added together give a palindrome (361163).

The spelling of 3611621 in words is "three million, six hundred eleven thousand, six hundred twenty-one".