3721946 has 8 divisors (see below), whose sum is σ = 5911380. Its totient is φ = 1751488.

The previous prime is 3721943. The next prime is 3721957. The reversal of 3721946 is 6491273.

It can be written as a sum of positive squares in 2 ways, for example, as 3279721 + 442225 = 1811^2 + 665^2 .

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

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (3721943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54701 + ... + 54768.

Almost surely, 2^3721946 is an apocalyptic number.

3721946 is a deficient number, since it is larger than the sum of its proper divisors (2189434).

3721946 is a wasteful number, since it uses less digits than its factorization.

3721946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109488.

The product of its digits is 9072, while the sum is 32.

The square root of 3721946 is about 1929.2345632400. The cubic root of 3721946 is about 154.9732315897.

The spelling of 3721946 in words is "three million, seven hundred twenty-one thousand, nine hundred forty-six".