3612605 has 4 divisors (see below), whose sum is σ = 4335132. Its totient is φ = 2890080.

The previous prime is 3612577. The next prime is 3612607. The reversal of 3612605 is 5062163.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1119364 + 2493241 = 1058^2 + 1579^2 .

It is not a de Polignac number, because 3612605 - 2¹⁶ = 3547069 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3612607) 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, 361256 + ... + 361265.

It is an arithmetic number, because the mean of its divisors is an integer number (1083783).

Almost surely, 2^3612605 is an apocalyptic number.

It is an amenable number.

3612605 is a deficient number, since it is larger than the sum of its proper divisors (722527).

3612605 is an equidigital number, since it uses as much as digits as its factorization.

3612605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 722526.

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

The square root of 3612605 is about 1900.6854026903. The cubic root of 3612605 is about 153.4405546006.

Adding to 3612605 its reverse (5062163), we get a palindrome (8674768).

The spelling of 3612605 in words is "three million, six hundred twelve thousand, six hundred five".