3915247 has 6 divisors (see below), whose sum is σ = 4554528. Its totient is φ = 3355884.

The previous prime is 3915239. The next prime is 3915251. The reversal of 3915247 is 7425193.

It is not a de Polignac number, because 3915247 - 2³ = 3915239 is a prime.

It is a Duffinian number.

3915247 is a lucky number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3915257) 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, 39903 + ... + 40000.

It is an arithmetic number, because the mean of its divisors is an integer number (759088).

Almost surely, 2^3915247 is an apocalyptic number.

3915247 is a deficient number, since it is larger than the sum of its proper divisors (639281).

3915247 is an equidigital number, since it uses as much as digits as its factorization.

3915247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79917 (or 79910 counting only the distinct ones).

The product of its digits is 7560, while the sum is 31.

The square root of 3915247 is about 1978.6983094954. The cubic root of 3915247 is about 157.6109506292.

The spelling of 3915247 in words is "three million, nine hundred fifteen thousand, two hundred forty-seven".