1992251 has 2 divisors, whose sum is σ = 1992252. Its totient is φ = 1992250.

The previous prime is 1992241. The next prime is 1992257. The reversal of 1992251 is 1522991.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1992251 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1992257) 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, 996125 + 996126.

It is an arithmetic number, because the mean of its divisors is an integer number (996126).

2^1992251 is an apocalyptic number.

1992251 is a deficient number, since it is larger than the sum of its proper divisors (1).

1992251 is an equidigital number, since it uses as much as digits as its factorization.

1992251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1620, while the sum is 29.

The square root of 1992251 is about 1411.4712182684. The cubic root of 1992251 is about 125.8291755810.

The spelling of 1992251 in words is "one million, nine hundred ninety-two thousand, two hundred fifty-one".