3961975 has 18 divisors (see below), whose sum is σ = 5196840. Its totient is φ = 2995920.

The previous prime is 3961973. The next prime is 3961981. The reversal of 3961975 is 5791693.

It is not a de Polignac number, because 3961975 - 2¹ = 3961973 is a prime.

3961975 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3961973) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 8806 + ... + 9244.

Almost surely, 2^3961975 is an apocalyptic number.

3961975 is a deficient number, since it is larger than the sum of its proper divisors (1234865).

3961975 is a wasteful number, since it uses less digits than its factorization.

3961975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487 (or 463 counting only the distinct ones).

The product of its digits is 51030, while the sum is 40.

The square root of 3961975 is about 1990.4710497769. The cubic root of 3961975 is about 158.2354951113.

The spelling of 3961975 in words is "three million, nine hundred sixty-one thousand, nine hundred seventy-five".