995621 has 4 divisors (see below), whose sum is σ = 1086144. Its totient is φ = 905100.

The previous prime is 995611. The next prime is 995623. The reversal of 995621 is 126599.

995621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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.

It is a cyclic number.

It is not a de Polignac number, because 995621 - 2¹⁸ = 733477 is a prime.

It is a super-2 number, since 2×995621² = 1982522351282, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (995623) 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, 45245 + ... + 45266.

It is an arithmetic number, because the mean of its divisors is an integer number (271536).

2⁹⁹⁵⁶²¹ is an apocalyptic number.

It is an amenable number.

995621 is a deficient number, since it is larger than the sum of its proper divisors (90523).

995621 is a wasteful number, since it uses less digits than its factorization.

995621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90522.

The product of its digits is 4860, while the sum is 32.

The square root of 995621 is about 997.8080977823. The cubic root of 995621 is about 99.8538197508.

The spelling of 995621 in words is "nine hundred ninety-five thousand, six hundred twenty-one".