3618521 has 4 divisors (see below), whose sum is σ = 3775872. Its totient is φ = 3461172.

The previous prime is 3618509. The next prime is 3618523. The reversal of 3618521 is 1258163.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3618521 - 2⁶ = 3618457 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3618523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78641 + ... + 78686.

It is an arithmetic number, because the mean of its divisors is an integer number (943968).

Almost surely, 2^3618521 is an apocalyptic number.

It is an amenable number.

3618521 is a deficient number, since it is larger than the sum of its proper divisors (157351).

3618521 is a wasteful number, since it uses less digits than its factorization.

3618521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157350.

The product of its digits is 1440, while the sum is 26.

The square root of 3618521 is about 1902.2410467656. The cubic root of 3618521 is about 153.5242669779.

The spelling of 3618521 in words is "three million, six hundred eighteen thousand, five hundred twenty-one".