3745639 has 4 divisors (see below), whose sum is σ = 3752856. Its totient is φ = 3738424.

The previous prime is 3745631. The next prime is 3745649. The reversal of 3745639 is 9365473.

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

It is a cyclic number.

It is not a de Polignac number, because 3745639 - 2³ = 3745631 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3745598 and 3745607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3745631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2764 + ... + 3889.

It is an arithmetic number, because the mean of its divisors is an integer number (938214).

Almost surely, 2^3745639 is an apocalyptic number.

3745639 is a deficient number, since it is larger than the sum of its proper divisors (7217).

3745639 is an equidigital number, since it uses as much as digits as its factorization.

3745639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7216.

The product of its digits is 68040, while the sum is 37.

The square root of 3745639 is about 1935.3653401877. The cubic root of 3745639 is about 155.3013768658.

The spelling of 3745639 in words is "three million, seven hundred forty-five thousand, six hundred thirty-nine".