3905247 has 8 divisors (see below), whose sum is σ = 5222656. Its totient is φ = 2595672.

The previous prime is 3905221. The next prime is 3905263. The reversal of 3905247 is 7425093.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3905247 - 2⁷ = 3905119 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 (3903247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 673 + ... + 2874.

It is an arithmetic number, because the mean of its divisors is an integer number (652832).

Almost surely, 2^3905247 is an apocalyptic number.

3905247 is a deficient number, since it is larger than the sum of its proper divisors (1317409).

3905247 is a wasteful number, since it uses less digits than its factorization.

3905247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3917.

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 3905247 is about 1976.1697801555. The cubic root of 3905247 is about 157.4766506077.

The spelling of 3905247 in words is "three million, nine hundred five thousand, two hundred forty-seven".