3861251 has 2 divisors, whose sum is σ = 3861252. Its totient is φ = 3861250.

The previous prime is 3861241. The next prime is 3861259. The reversal of 3861251 is 1521683.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3861251 - 2¹⁸ = 3599107 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3861251.

It is not a weakly prime, because it can be changed into another prime (3861259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1930625 + 1930626.

It is an arithmetic number, because the mean of its divisors is an integer number (1930626).

Almost surely, 2^3861251 is an apocalyptic number.

3861251 is a deficient number, since it is larger than the sum of its proper divisors (1).

3861251 is an equidigital number, since it uses as much as digits as its factorization.

3861251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440, while the sum is 26.

The square root of 3861251 is about 1965.0066157649. The cubic root of 3861251 is about 156.8830454120.

Subtracting from 3861251 its sum of digits (26), we obtain a square (3861225 = 1965²).

The spelling of 3861251 in words is "three million, eight hundred sixty-one thousand, two hundred fifty-one".