3865157 has 2 divisors, whose sum is σ = 3865158. Its totient is φ = 3865156.

The previous prime is 3865153. The next prime is 3865187. The reversal of 3865157 is 7515683.

It is a Cunningham number, because it is equal to 1966²+1.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3865156 + 1 = 1966^2 + 1^2 .

It is a cyclic number.

It is not a de Polignac number, because 3865157 - 2² = 3865153 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3865153) 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 as a sum of consecutive naturals, namely, 1932578 + 1932579.

It is an arithmetic number, because the mean of its divisors is an integer number (1932579).

Almost surely, 2^3865157 is an apocalyptic number.

It is an amenable number.

3865157 is a deficient number, since it is larger than the sum of its proper divisors (1).

3865157 is an equidigital number, since it uses as much as digits as its factorization.

3865157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25200, while the sum is 35.

The square root of 3865157 is about 1966.0002543235. Note that the first 3 decimals coincide. The cubic root of 3865157 is about 156.9359279849.

The spelling of 3865157 in words is "three million, eight hundred sixty-five thousand, one hundred fifty-seven".