3720145 has 32 divisors (see below), whose sum is σ = 5410944. Its totient is φ = 2439360.

The previous prime is 3720137. The next prime is 3720151. The reversal of 3720145 is 5410273.

3720145 = T₁₈₅ + T₁₈₆ + ... + T₃₀₅.

3720145 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 3720145 - 2³ = 3720137 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors.

It is a nialpdrome in base 11.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 86494 + ... + 86536.

It is an arithmetic number, because the mean of its divisors is an integer number (169092).

Almost surely, 2^3720145 is an apocalyptic number.

It is an amenable number.

3720145 is a deficient number, since it is larger than the sum of its proper divisors (1690799).

3720145 is a wasteful number, since it uses less digits than its factorization.

3720145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94 (or 72 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 3720145 is about 1928.7677413312. The cubic root of 3720145 is about 154.9482310639.

The spelling of 3720145 in words is "three million, seven hundred twenty thousand, one hundred forty-five".