3646249 has 4 divisors (see below), whose sum is σ = 3652864. Its totient is φ = 3639636.

The previous prime is 3646231. The next prime is 3646261. The reversal of 3646249 is 9426463.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9426463 = 599 ⋅15737.

It is a cyclic number.

It is not a de Polignac number, because 3646249 - 2⁹ = 3645737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3646219) 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, 2397 + ... + 3610.

It is an arithmetic number, because the mean of its divisors is an integer number (913216).

Almost surely, 2^3646249 is an apocalyptic number.

It is an amenable number.

3646249 is a deficient number, since it is larger than the sum of its proper divisors (6615).

3646249 is an equidigital number, since it uses as much as digits as its factorization.

3646249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6614.

The product of its digits is 31104, while the sum is 34.

The square root of 3646249 is about 1909.5153835463. The cubic root of 3646249 is about 153.9154114647.

The spelling of 3646249 in words is "three million, six hundred forty-six thousand, two hundred forty-nine".