3872147 has 4 divisors (see below), whose sum is σ = 3888456. Its totient is φ = 3855840.

The previous prime is 3872129. The next prime is 3872153. The reversal of 3872147 is 7412783.

It is a happy number.

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 3872147 - 2¹⁸ = 3610003 is a prime.

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

It is a Duffinian number.

It is a plaindrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (3872047) 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, 7793 + ... + 8274.

It is an arithmetic number, because the mean of its divisors is an integer number (972114).

Almost surely, 2^3872147 is an apocalyptic number.

3872147 is a deficient number, since it is larger than the sum of its proper divisors (16309).

3872147 is a wasteful number, since it uses less digits than its factorization.

3872147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16308.

The product of its digits is 9408, while the sum is 32.

The square root of 3872147 is about 1967.7771723445. Note that the first 3 decimals coincide. The cubic root of 3872147 is about 157.0304753747.

The spelling of 3872147 in words is "three million, eight hundred seventy-two thousand, one hundred forty-seven".