3727861 has 8 divisors (see below), whose sum is σ = 3902904. Its totient is φ = 3556800.

The previous prime is 3727859. The next prime is 3727873. The reversal of 3727861 is 1687273.

It can be written as a sum of positive squares in 4 ways, for example, as 820836 + 2907025 = 906^2 + 1705^2 .

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 3727861 - 2¹ = 3727859 is a prime.

It is a Duffinian number.

3727861 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3727961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1011 + ... + 2911.

It is an arithmetic number, because the mean of its divisors is an integer number (487863).

Almost surely, 2^3727861 is an apocalyptic number.

It is an amenable number.

3727861 is a deficient number, since it is larger than the sum of its proper divisors (175043).

3727861 is a wasteful number, since it uses less digits than its factorization.

3727861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1991.

The product of its digits is 14112, while the sum is 34.

The square root of 3727861 is about 1930.7669460606. The cubic root of 3727861 is about 155.0552837829.

It can be divided in two parts, 372 and 7861, that multiplied together give a palindrome (2924292).

The spelling of 3727861 in words is "three million, seven hundred twenty-seven thousand, eight hundred sixty-one".