1972123 has 2 divisors, whose sum is σ = 1972124. Its totient is φ = 1972122.

The previous prime is 1972121. The next prime is 1972129. The reversal of 1972123 is 3212791.

It is a weak prime.

It is an emirp because it is prime and its reverse (3212791) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1972123 - 2¹ = 1972121 is a prime.

Together with 1972121, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1972121) 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, 986061 + 986062.

It is an arithmetic number, because the mean of its divisors is an integer number (986062).

2^1972123 is an apocalyptic number.

1972123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1972123 is an equidigital number, since it uses as much as digits as its factorization.

1972123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 756, while the sum is 25.

The square root of 1972123 is about 1404.3229685510. The cubic root of 1972123 is about 125.4039836379.

It can be divided in two parts, 1972 and 123, that multiplied together give a triangular number (242556 = T₆₉₆).

The spelling of 1972123 in words is "one million, nine hundred seventy-two thousand, one hundred twenty-three".