3748509 has 6 divisors (see below), whose sum is σ = 5414526. Its totient is φ = 2499000.

The previous prime is 3748499. The next prime is 3748519. The reversal of 3748509 is 9058473.

It is an interprime number because it is at equal distance from previous prime (3748499) and next prime (3748519).

It can be written as a sum of positive squares in only one way, i.e., 2965284 + 783225 = 1722^2 + 885^2 .

It is a de Polignac number, because none of the positive numbers 2^k-3748509 is a prime.

It is a Curzon number.

3748509 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3748519) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 208242 + ... + 208259.

It is an arithmetic number, because the mean of its divisors is an integer number (902421).

Almost surely, 2^3748509 is an apocalyptic number.

It is an amenable number.

3748509 is a deficient number, since it is larger than the sum of its proper divisors (1666017).

3748509 is a wasteful number, since it uses less digits than its factorization.

3748509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416507 (or 416504 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 3748509 is about 1936.1066602850. The cubic root of 3748509 is about 155.3410319741.

Subtracting from 3748509 its sum of digits (36), we obtain a palindrome (3748473).

The spelling of 3748509 in words is "three million, seven hundred forty-eight thousand, five hundred nine".