992521 has 2 divisors, whose sum is σ = 992522. Its totient is φ = 992520.

The previous prime is 992513. The next prime is 992539. The reversal of 992521 is 125299.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 978121 + 14400 = 989^2 + 120^2 .

It is an emirp because it is prime and its reverse (125299) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 992521 - 2³ = 992513 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 992521.

It is not a weakly prime, because it can be changed into another prime (992561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 496260 + 496261.

It is an arithmetic number, because the mean of its divisors is an integer number (496261).

2⁹⁹²⁵²¹ is an apocalyptic number.

It is an amenable number.

992521 is a deficient number, since it is larger than the sum of its proper divisors (1).

992521 is an equidigital number, since it uses as much as digits as its factorization.

992521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1620, while the sum is 28.

The square root of 992521 is about 996.2534818007. The cubic root of 992521 is about 99.7500758998.

The spelling of 992521 in words is "nine hundred ninety-two thousand, five hundred twenty-one".