3965951 has 4 divisors (see below), whose sum is σ = 4326504. Its totient is φ = 3605400.

The previous prime is 3965939. The next prime is 3965963. The reversal of 3965951 is 1595693.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1595693 = 11 ⋅145063.

It is an interprime number because it is at equal distance from previous prime (3965939) and next prime (3965963).

It is a cyclic number.

It is not a de Polignac number, because 3965951 - 2⁶ = 3965887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3965911) 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, 180260 + ... + 180281.

It is an arithmetic number, because the mean of its divisors is an integer number (1081626).

Almost surely, 2^3965951 is an apocalyptic number.

3965951 is a deficient number, since it is larger than the sum of its proper divisors (360553).

3965951 is a wasteful number, since it uses less digits than its factorization.

3965951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360552.

The product of its digits is 36450, while the sum is 38.

The square root of 3965951 is about 1991.4695578893. The cubic root of 3965951 is about 158.2884092924.

The spelling of 3965951 in words is "three million, nine hundred sixty-five thousand, nine hundred fifty-one".