4185861 has 8 divisors (see below), whose sum is σ = 5598624. Its totient is φ = 2781840.

The previous prime is 4185851. The next prime is 4185869. The reversal of 4185861 is 1685814.

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

It is not a de Polignac number, because 4185861 - 2⁵ = 4185829 is a prime.

It is a super-2 number, since 2×4185861² = 35042864622642, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4185869) 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, 970 + ... + 3051.

It is an arithmetic number, because the mean of its divisors is an integer number (699828).

Almost surely, 2^4185861 is an apocalyptic number.

It is an amenable number.

4185861 is a deficient number, since it is larger than the sum of its proper divisors (1412763).

4185861 is a wasteful number, since it uses less digits than its factorization.

4185861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4371.

The product of its digits is 7680, while the sum is 33.

The square root of 4185861 is about 2045.9376823354. The cubic root of 4185861 is about 161.1616113149.

The spelling of 4185861 in words is "four million, one hundred eighty-five thousand, eight hundred sixty-one".