3654509 has 6 divisors (see below), whose sum is σ = 3727626. Its totient is φ = 3582800.

The previous prime is 3654503. The next prime is 3654529. The reversal of 3654509 is 9054563.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 220900 + 3433609 = 470^2 + 1853^2 .

It is not a de Polignac number, because 3654509 - 2¹⁶ = 3588973 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3654503) 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, 2159 + ... + 3459.

It is an arithmetic number, because the mean of its divisors is an integer number (621271).

Almost surely, 2^3654509 is an apocalyptic number.

It is an amenable number.

3654509 is a deficient number, since it is larger than the sum of its proper divisors (73117).

3654509 is an equidigital number, since it uses as much as digits as its factorization.

3654509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1407 (or 1354 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 32.

The square root of 3654509 is about 1911.6770124684. The cubic root of 3654509 is about 154.0315474808.

It can be divided in two parts, 36 and 54509, that added together give a palindrome (54545).

The spelling of 3654509 in words is "three million, six hundred fifty-four thousand, five hundred nine".