3721550 has 60 divisors (see below), whose sum is σ = 8335776. Its totient is φ = 1234800.

The previous prime is 3721537. The next prime is 3721559. The reversal of 3721550 is 551273.

3721550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3721559) 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 29 ways as a sum of consecutive naturals, for example, 120035 + ... + 120065.

Almost surely, 2^3721550 is an apocalyptic number.

3721550 is an abundant number, since it is smaller than the sum of its proper divisors (4614226).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3721550 is an equidigital number, since it uses as much as digits as its factorization.

3721550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71 (or 45 counting only the distinct ones).

The product of its (nonzero) digits is 1050, while the sum is 23.

The square root of 3721550 is about 1929.1319291329. The cubic root of 3721550 is about 154.9677352197.

The spelling of 3721550 in words is "three million, seven hundred twenty-one thousand, five hundred fifty".