3721749 has 16 divisors (see below), whose sum is σ = 5111424. Its totient is φ = 2408000.

The previous prime is 3721741. The next prime is 3721771. The reversal of 3721749 is 9471273.

It is a cyclic number.

It is not a de Polignac number, because 3721749 - 2³ = 3721741 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3721741) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21427 + ... + 21599.

It is an arithmetic number, because the mean of its divisors is an integer number (319464).

Almost surely, 2^3721749 is an apocalyptic number.

It is an amenable number.

3721749 is a deficient number, since it is larger than the sum of its proper divisors (1389675).

3721749 is a wasteful number, since it uses less digits than its factorization.

3721749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348.

The product of its digits is 10584, while the sum is 33.

The square root of 3721749 is about 1929.1835060460. The cubic root of 3721749 is about 154.9704973331.

The spelling of 3721749 in words is "three million, seven hundred twenty-one thousand, seven hundred forty-nine".