3750721 has 16 divisors (see below), whose sum is σ = 4290048. Its totient is φ = 3254400.

The previous prime is 3750701. The next prime is 3750731. The reversal of 3750721 is 1270573.

3750721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 3750721 - 2¹⁵ = 3717953 is a prime.

It is a Duffinian number.

3750721 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3750701) 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 in 15 ways as a sum of consecutive naturals, for example, 16410 + ... + 16636.

It is an arithmetic number, because the mean of its divisors is an integer number (268128).

Almost surely, 2^3750721 is an apocalyptic number.

3750721 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

3750721 is a deficient number, since it is larger than the sum of its proper divisors (539327).

3750721 is a wasteful number, since it uses less digits than its factorization.

3750721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312.

The product of its (nonzero) digits is 1470, while the sum is 25.

The square root of 3750721 is about 1936.6778255559. The cubic root of 3750721 is about 155.3715816136.

The spelling of 3750721 in words is "three million, seven hundred fifty thousand, seven hundred twenty-one".