3437721 has 48 divisors (see below), whose sum is σ = 6150144. Its totient is φ = 1877904.

The previous prime is 3437719. The next prime is 3437743. The reversal of 3437721 is 1277343.

3437721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3437721 - 2¹ = 3437719 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3437701) 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 47 ways as a sum of consecutive naturals, for example, 73120 + ... + 73166.

It is an arithmetic number, because the mean of its divisors is an integer number (128128).

Almost surely, 2^3437721 is an apocalyptic number.

It is an amenable number.

3437721 is a deficient number, since it is larger than the sum of its proper divisors (2712423).

3437721 is an equidigital number, since it uses as much as digits as its factorization.

3437721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112 (or 100 counting only the distinct ones).

The product of its digits is 3528, while the sum is 27.

The square root of 3437721 is about 1854.1092200839. The cubic root of 3437721 is about 150.9235026177.

The spelling of 3437721 in words is "three million, four hundred thirty-seven thousand, seven hundred twenty-one".