3872157 has 4 divisors (see below), whose sum is σ = 5162880. Its totient is φ = 2581436.

The previous prime is 3872153. The next prime is 3872201. The reversal of 3872157 is 7512783.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7512783 = 3 ⋅2504261.

It is a cyclic number.

It is not a de Polignac number, because 3872157 - 2² = 3872153 is a prime.

It is an Ulam number.

It is a D-number.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 645357 + ... + 645362.

It is an arithmetic number, because the mean of its divisors is an integer number (1290720).

Almost surely, 2^3872157 is an apocalyptic number.

It is an amenable number.

3872157 is a deficient number, since it is larger than the sum of its proper divisors (1290723).

3872157 is a wasteful number, since it uses less digits than its factorization.

3872157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1290722.

The product of its digits is 11760, while the sum is 33.

The square root of 3872157 is about 1967.7797132809. The cubic root of 3872157 is about 157.0306105541.

The spelling of 3872157 in words is "three million, eight hundred seventy-two thousand, one hundred fifty-seven".