3721786 has 4 divisors (see below), whose sum is σ = 5582682. Its totient is φ = 1860892.

The previous prime is 3721771. The next prime is 3721787. The reversal of 3721786 is 6871273.

3721786 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 3258025 + 463761 = 1805^2 + 681^2 .

It is not an unprimeable number, because it can be changed into a prime (3721787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 930445 + ... + 930448.

Almost surely, 2^3721786 is an apocalyptic number.

3721786 is a deficient number, since it is larger than the sum of its proper divisors (1860896).

3721786 is a wasteful number, since it uses less digits than its factorization.

3721786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1860895.

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

The square root of 3721786 is about 1929.1930955713. The cubic root of 3721786 is about 154.9710108811.

The spelling of 3721786 in words is "three million, seven hundred twenty-one thousand, seven hundred eighty-six".