1992129 has 4 divisors (see below), whose sum is σ = 2656176. Its totient is φ = 1328084.

The previous prime is 1992119. The next prime is 1992139. The reversal of 1992129 is 9212991.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9212991 = 3 ⋅3070997.

It is an interprime number because it is at equal distance from previous prime (1992119) and next prime (1992139).

It is a cyclic number.

It is not a de Polignac number, because 1992129 - 2⁹ = 1991617 is a prime.

It is a D-number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1992129.

It is not an unprimeable number, because it can be changed into a prime (1992119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 332019 + ... + 332024.

It is an arithmetic number, because the mean of its divisors is an integer number (664044).

2^1992129 is an apocalyptic number.

It is an amenable number.

1992129 is a deficient number, since it is larger than the sum of its proper divisors (664047).

1992129 is an equidigital number, since it uses as much as digits as its factorization.

1992129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664046.

The product of its digits is 2916, while the sum is 33.

The square root of 1992129 is about 1411.4280002891. The cubic root of 1992129 is about 125.8266070505.

The spelling of 1992129 in words is "one million, nine hundred ninety-two thousand, one hundred twenty-nine".