3661487 has 4 divisors (see below), whose sum is σ = 3665376. Its totient is φ = 3657600.

The previous prime is 3661457. The next prime is 3661499. The reversal of 3661487 is 7841663.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 7841663 = 457 ⋅17159.

It is a cyclic number.

It is not a de Polignac number, because 3661487 - 2¹⁰ = 3660463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3661417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 458 + ... + 2744.

It is an arithmetic number, because the mean of its divisors is an integer number (916344).

Almost surely, 2^3661487 is an apocalyptic number.

3661487 is a deficient number, since it is larger than the sum of its proper divisors (3889).

3661487 is a wasteful number, since it uses less digits than its factorization.

3661487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3888.

The product of its digits is 24192, while the sum is 35.

The square root of 3661487 is about 1913.5012411807. The cubic root of 3661487 is about 154.1295222257.

Multiplying 3661487 by its sum of digits (35), we get a triangular number (128152045 = T₁₆₀₀₉).

The spelling of 3661487 in words is "three million, six hundred sixty-one thousand, four hundred eighty-seven".