3661239 has 8 divisors (see below), whose sum is σ = 5168880. Its totient is φ = 2297216.

The previous prime is 3661211. The next prime is 3661247. The reversal of 3661239 is 9321663.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3661239 - 2⁷ = 3661111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3661249) 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 7 ways as a sum of consecutive naturals, for example, 35844 + ... + 35945.

It is an arithmetic number, because the mean of its divisors is an integer number (646110).

Almost surely, 2^3661239 is an apocalyptic number.

3661239 is a deficient number, since it is larger than the sum of its proper divisors (1507641).

3661239 is a wasteful number, since it uses less digits than its factorization.

3661239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71809.

The product of its digits is 5832, while the sum is 30.

The square root of 3661239 is about 1913.4364374078. The cubic root of 3661239 is about 154.1260423112.

The spelling of 3661239 in words is "three million, six hundred sixty-one thousand, two hundred thirty-nine".