1972143 has 18 divisors (see below), whose sum is σ = 3011424. Its totient is φ = 1243512.

The previous prime is 1972133. The next prime is 1972147. The reversal of 1972143 is 3412791.

It is not a de Polignac number, because 1972143 - 2⁵ = 1972111 is a prime.

It is an Ulam number.

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 polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2946 + ... + 3552.

2^1972143 is an apocalyptic number.

1972143 is a deficient number, since it is larger than the sum of its proper divisors (1039281).

1972143 is a wasteful number, since it uses less digits than its factorization.

1972143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 651 (or 629 counting only the distinct ones).

The product of its digits is 1512, while the sum is 27.

The square root of 1972143 is about 1404.3300894021. The cubic root of 1972143 is about 125.4044075586.

The spelling of 1972143 in words is "one million, nine hundred seventy-two thousand, one hundred forty-three".