995021 has 4 divisors (see below), whose sum is σ = 998844. Its totient is φ = 991200.

The previous prime is 995009. The next prime is 995023. The reversal of 995021 is 120599.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 120599 = 83 ⋅1453.

It can be written as a sum of positive squares in 2 ways, for example, as 546121 + 448900 = 739^2 + 670^2 .

It is a cyclic number.

It is not a de Polignac number, because 995021 - 2¹⁰ = 993997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (995023) 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 in 3 ways as a sum of consecutive naturals, for example, 1490 + ... + 2051.

It is an arithmetic number, because the mean of its divisors is an integer number (249711).

2⁹⁹⁵⁰²¹ is an apocalyptic number.

It is an amenable number.

995021 is a deficient number, since it is larger than the sum of its proper divisors (3823).

995021 is a wasteful number, since it uses less digits than its factorization.

995021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3822.

The product of its (nonzero) digits is 810, while the sum is 26.

The square root of 995021 is about 997.5073934563. The cubic root of 995021 is about 99.8337571195.

The spelling of 995021 in words is "nine hundred ninety-five thousand, twenty-one".