3851861 has 8 divisors (see below), whose sum is σ = 4173624. Its totient is φ = 3533760.

The previous prime is 3851857. The next prime is 3851863. The reversal of 3851861 is 1681583.

It can be written as a sum of positive squares in 4 ways, for example, as 722500 + 3129361 = 850^2 + 1769^2 .

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 3851861 - 2² = 3851857 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3851863) 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, 1535 + ... + 3171.

It is an arithmetic number, because the mean of its divisors is an integer number (521703).

Almost surely, 2^3851861 is an apocalyptic number.

It is an amenable number.

3851861 is a deficient number, since it is larger than the sum of its proper divisors (321763).

3851861 is a wasteful number, since it uses less digits than its factorization.

3851861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1831.

The product of its digits is 5760, while the sum is 32.

The square root of 3851861 is about 1962.6158564528. The cubic root of 3851861 is about 156.7557699462.

The spelling of 3851861 in words is "three million, eight hundred fifty-one thousand, eight hundred sixty-one".