992551 has 4 divisors (see below), whose sum is σ = 1134352. Its totient is φ = 850752.

The previous prime is 992549. The next prime is 992561. The reversal of 992551 is 155299.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 992551 - 2¹ = 992549 is a prime.

It is a Duffinian number.

992551 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (992521) 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, 70890 + ... + 70903.

It is an arithmetic number, because the mean of its divisors is an integer number (283588).

2⁹⁹²⁵⁵¹ is an apocalyptic number.

992551 is a deficient number, since it is larger than the sum of its proper divisors (141801).

992551 is a wasteful number, since it uses less digits than its factorization.

992551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141800.

The product of its digits is 4050, while the sum is 31.

The square root of 992551 is about 996.2685380960. The cubic root of 992551 is about 99.7510809070.

The spelling of 992551 in words is "nine hundred ninety-two thousand, five hundred fifty-one".