3615481 has 4 divisors (see below), whose sum is σ = 3652852. Its totient is φ = 3578112.

The previous prime is 3615473. The next prime is 3615523. The reversal of 3615481 is 1845163.

3615481 = 28² + 29² + ... + 221².

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 2223081 + 1392400 = 1491^2 + 1180^2 .

It is a cyclic number.

It is not a de Polignac number, because 3615481 - 2³ = 3615473 is a prime.

It is a super-2 number, since 2×3615481² = 26143405722722, which contains 22 as substring.

It is a Duffinian number.

3615481 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3615431) 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, 18540 + ... + 18733.

It is an arithmetic number, because the mean of its divisors is an integer number (913213).

Almost surely, 2^3615481 is an apocalyptic number.

It is an amenable number.

3615481 is a deficient number, since it is larger than the sum of its proper divisors (37371).

3615481 is an equidigital number, since it uses as much as digits as its factorization.

3615481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37370.

The product of its digits is 2880, while the sum is 28.

The square root of 3615481 is about 1901.4418213556. The cubic root of 3615481 is about 153.4812618817.

It can be divided in two parts, 3615 and 481, that added together give a 12-th power (4096 = 2¹²).

The spelling of 3615481 in words is "three million, six hundred fifteen thousand, four hundred eighty-one".