3721955 has 4 divisors (see below), whose sum is σ = 4466352. Its totient is φ = 2977560.

The previous prime is 3721943. The next prime is 3721957. The reversal of 3721955 is 5591273.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 3721955 - 2¹² = 3717859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3721957) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 372191 + ... + 372200.

It is an arithmetic number, because the mean of its divisors is an integer number (1116588).

Almost surely, 2^3721955 is an apocalyptic number.

3721955 is a deficient number, since it is larger than the sum of its proper divisors (744397).

3721955 is an equidigital number, since it uses as much as digits as its factorization.

3721955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 744396.

The product of its digits is 9450, while the sum is 32.

The square root of 3721955 is about 1929.2368957699. The cubic root of 3721955 is about 154.9733565026.

The spelling of 3721955 in words is "three million, seven hundred twenty-one thousand, nine hundred fifty-five".