3957543 has 24 divisors (see below), whose sum is σ = 6037200. Its totient is φ = 2494464.

The previous prime is 3957521. The next prime is 3957571. The reversal of 3957543 is 3457593.

It is not a de Polignac number, because 3957543 - 2⁶ = 3957479 is a prime.

It is an Ulam number.

3957543 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 3957498 and 3957507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3957143) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15271 + ... + 15527.

It is an arithmetic number, because the mean of its divisors is an integer number (251550).

Almost surely, 2^3957543 is an apocalyptic number.

3957543 is a deficient number, since it is larger than the sum of its proper divisors (2079657).

3957543 is a wasteful number, since it uses less digits than its factorization.

3957543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351 (or 348 counting only the distinct ones).

The product of its digits is 56700, while the sum is 36.

The square root of 3957543 is about 1989.3574339470. The cubic root of 3957543 is about 158.1764705611.

The spelling of 3957543 in words is "three million, nine hundred fifty-seven thousand, five hundred forty-three".