3972143 has 4 divisors (see below), whose sum is σ = 4539600. Its totient is φ = 3404688.

The previous prime is 3972139. The next prime is 3972151. The reversal of 3972143 is 3412793.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 3972143 - 2² = 3972139 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3972103) 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 3 ways as a sum of consecutive naturals, for example, 283718 + ... + 283731.

It is an arithmetic number, because the mean of its divisors is an integer number (1134900).

Almost surely, 2^3972143 is an apocalyptic number.

3972143 is a deficient number, since it is larger than the sum of its proper divisors (567457).

3972143 is an equidigital number, since it uses as much as digits as its factorization.

3972143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 567456.

The product of its digits is 4536, while the sum is 29.

The square root of 3972143 is about 1993.0235823994. The cubic root of 3972143 is about 158.3707444992.

The spelling of 3972143 in words is "three million, nine hundred seventy-two thousand, one hundred forty-three".