3965251 has 4 divisors (see below), whose sum is σ = 3980592. Its totient is φ = 3949912.

The previous prime is 3965231. The next prime is 3965309. The reversal of 3965251 is 1525693.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1525693 = 13 ⋅117361.

It is a cyclic number.

It is not a de Polignac number, because 3965251 - 2⁵ = 3965219 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

3965251 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3965231) 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, 7276 + ... + 7801.

It is an arithmetic number, because the mean of its divisors is an integer number (995148).

Almost surely, 2^3965251 is an apocalyptic number.

3965251 is a deficient number, since it is larger than the sum of its proper divisors (15341).

3965251 is a wasteful number, since it uses less digits than its factorization.

3965251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15340.

The product of its digits is 8100, while the sum is 31.

The square root of 3965251 is about 1991.2938005227. The cubic root of 3965251 is about 158.2790959814.

The spelling of 3965251 in words is "three million, nine hundred sixty-five thousand, two hundred fifty-one".