3872155 has 16 divisors (see below), whose sum is σ = 5342400. Its totient is φ = 2639232.

The previous prime is 3872153. The next prime is 3872201. The reversal of 3872155 is 5512783.

It is a cyclic number.

It is not a de Polignac number, because 3872155 - 2¹ = 3872153 is a prime.

It is an Ulam number.

3872155 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3872153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10921 + ... + 11269.

It is an arithmetic number, because the mean of its divisors is an integer number (333900).

Almost surely, 2^3872155 is an apocalyptic number.

3872155 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

3872155 is a deficient number, since it is larger than the sum of its proper divisors (1470245).

3872155 is a wasteful number, since it uses less digits than its factorization.

3872155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 678.

The product of its digits is 8400, while the sum is 31.

The square root of 3872155 is about 1967.7792050939. The cubic root of 3872155 is about 157.0305835182.

The spelling of 3872155 in words is "three million, eight hundred seventy-two thousand, one hundred fifty-five".