3972142 has 4 divisors (see below), whose sum is σ = 5958216. Its totient is φ = 1986070.

The previous prime is 3972139. The next prime is 3972151. The reversal of 3972142 is 2412793.

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

It is a self number, because there is not a number n which added to its sum of digits gives 3972142.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 993034 + ... + 993037.

It is an arithmetic number, because the mean of its divisors is an integer number (1489554).

Almost surely, 2^3972142 is an apocalyptic number.

3972142 is a deficient number, since it is larger than the sum of its proper divisors (1986074).

3972142 is a wasteful number, since it uses less digits than its factorization.

3972142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1986073.

The product of its digits is 3024, while the sum is 28.

The square root of 3972142 is about 1993.0233315242. The cubic root of 3972142 is about 158.3707312091.

It can be divided in two parts, 3972 and 142, that added together give a palindrome (4114).

The spelling of 3972142 in words is "three million, nine hundred seventy-two thousand, one hundred forty-two".