1972142 has 4 divisors (see below), whose sum is σ = 2958216. Its totient is φ = 986070.

The previous prime is 1972133. The next prime is 1972147. The reversal of 1972142 is 2412791.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2412791 = 19 ⋅126989.

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1972147) 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 as a sum of consecutive naturals, namely, 493034 + ... + 493037.

It is an arithmetic number, because the mean of its divisors is an integer number (739554).

2^1972142 is an apocalyptic number.

1972142 is a deficient number, since it is larger than the sum of its proper divisors (986074).

1972142 is an equidigital number, since it uses as much as digits as its factorization.

1972142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 986073.

The product of its digits is 1008, while the sum is 26.

The square root of 1972142 is about 1404.3297333604. The cubic root of 1972142 is about 125.4043863626.

The spelling of 1972142 in words is "one million, nine hundred seventy-two thousand, one hundred forty-two".