3720641 has 8 divisors (see below), whose sum is σ = 3931200. Its totient is φ = 3514192.

The previous prime is 3720623. The next prime is 3720649. The reversal of 3720641 is 1460273.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3720641 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3720649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 935 + ... + 2883.

It is an arithmetic number, because the mean of its divisors is an integer number (491400).

Almost surely, 2^3720641 is an apocalyptic number.

It is an amenable number.

3720641 is a deficient number, since it is larger than the sum of its proper divisors (210559).

3720641 is a wasteful number, since it uses less digits than its factorization.

3720641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2055.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 3720641 is about 1928.8963165500. The cubic root of 3720641 is about 154.9551170775.

The spelling of 3720641 in words is "three million, seven hundred twenty thousand, six hundred forty-one".