3645047 has 4 divisors (see below), whose sum is σ = 4165776. Its totient is φ = 3124320.

The previous prime is 3645013. The next prime is 3645049. The reversal of 3645047 is 7405463.

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 3645047 - 2⁶ = 3644983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3645049) 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, 260354 + ... + 260367.

It is an arithmetic number, because the mean of its divisors is an integer number (1041444).

Almost surely, 2^3645047 is an apocalyptic number.

3645047 is a deficient number, since it is larger than the sum of its proper divisors (520729).

3645047 is an equidigital number, since it uses as much as digits as its factorization.

3645047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520728.

The product of its (nonzero) digits is 10080, while the sum is 29.

The square root of 3645047 is about 1909.2006180598. The cubic root of 3645047 is about 153.8984966702.

The spelling of 3645047 in words is "three million, six hundred forty-five thousand, forty-seven".