3961431 has 6 divisors (see below), whose sum is σ = 5722080. Its totient is φ = 2640948.

The previous prime is 3961427. The next prime is 3961439. The reversal of 3961431 is 1341693.

It is not a de Polignac number, because 3961431 - 2² = 3961427 is a prime.

It is a super-2 number, since 2×3961431² = 31385871135522, which contains 22 as substring.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 3961395 and 3961404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3961439) 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 in 5 ways as a sum of consecutive naturals, for example, 220071 + ... + 220088.

It is an arithmetic number, because the mean of its divisors is an integer number (953680).

Almost surely, 2^3961431 is an apocalyptic number.

3961431 is a deficient number, since it is larger than the sum of its proper divisors (1760649).

3961431 is a wasteful number, since it uses less digits than its factorization.

3961431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440165 (or 440162 counting only the distinct ones).

The product of its digits is 1944, while the sum is 27.

The square root of 3961431 is about 1990.3343940152. The cubic root of 3961431 is about 158.2282525913.

The spelling of 3961431 in words is "three million, nine hundred sixty-one thousand, four hundred thirty-one".