995521 has 4 divisors (see below), whose sum is σ = 1019844. Its totient is φ = 971200.

The previous prime is 995513. The next prime is 995531. The reversal of 995521 is 125599.

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

It can be written as a sum of positive squares in 2 ways, for example, as 505521 + 490000 = 711^2 + 700^2 .

It is a cyclic number.

It is not a de Polignac number, because 995521 - 2³ = 995513 is a prime.

It is a super-2 number, since 2×995521² = 1982124122882, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (995531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12100 + ... + 12181.

It is an arithmetic number, because the mean of its divisors is an integer number (254961).

2⁹⁹⁵⁵²¹ is an apocalyptic number.

It is an amenable number.

995521 is a deficient number, since it is larger than the sum of its proper divisors (24323).

995521 is a wasteful number, since it uses less digits than its factorization.

995521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24322.

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

The square root of 995521 is about 997.7579866882. The cubic root of 995521 is about 99.8504765388.

The spelling of 995521 in words is "nine hundred ninety-five thousand, five hundred twenty-one".