3861559 has 8 divisors (see below), whose sum is σ = 4190480. Its totient is φ = 3537216.

The previous prime is 3861551. The next prime is 3861563. The reversal of 3861559 is 9551683.

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 3861559 - 2³ = 3861551 is a prime.

It is a Duffinian number.

3861559 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3861551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 739 + ... + 2875.

It is an arithmetic number, because the mean of its divisors is an integer number (523810).

Almost surely, 2^3861559 is an apocalyptic number.

3861559 is a deficient number, since it is larger than the sum of its proper divisors (328921).

3861559 is a wasteful number, since it uses less digits than its factorization.

3861559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2289.

The product of its digits is 32400, while the sum is 37.

The square root of 3861559 is about 1965.0849854396. The cubic root of 3861559 is about 156.8872166589.

The spelling of 3861559 in words is "three million, eight hundred sixty-one thousand, five hundred fifty-nine".