3726405 has 24 divisors (see below), whose sum is σ = 6700512. Its totient is φ = 1986768.

The previous prime is 3726403. The next prime is 3726407. The reversal of 3726405 is 5046273.

It is a happy number.

3726405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (3726403) and next prime (3726407).

It is not a de Polignac number, because 3726405 - 2¹ = 3726403 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 a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3726403) 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 23 ways as a sum of consecutive naturals, for example, 319 + ... + 2748.

It is an arithmetic number, because the mean of its divisors is an integer number (279188).

Almost surely, 2^3726405 is an apocalyptic number.

It is an amenable number.

3726405 is a deficient number, since it is larger than the sum of its proper divisors (2974107).

3726405 is an equidigital number, since it uses as much as digits as its factorization.

3726405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3087 (or 3075 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 3726405 is about 1930.3898569978. The cubic root of 3726405 is about 155.0350943775.

The spelling of 3726405 in words is "three million, seven hundred twenty-six thousand, four hundred five".