950821 has 4 divisors (see below), whose sum is σ = 952812. Its totient is φ = 948832.

The previous prime is 950819. The next prime is 950837. The reversal of 950821 is 128059.

950821 = 689² + 690².

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 128059 = 79 ⋅1621.

It can be written as a sum of positive squares in 2 ways, for example, as 474721 + 476100 = 689^2 + 690^2 .

It is a cyclic number.

It is not a de Polignac number, because 950821 - 2¹ = 950819 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 (950221) 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, 201 + ... + 1393.

It is an arithmetic number, because the mean of its divisors is an integer number (238203).

2⁹⁵⁰⁸²¹ is an apocalyptic number.

950821 is the 690-th centered square number.

It is an amenable number.

950821 is a deficient number, since it is larger than the sum of its proper divisors (1991).

950821 is a wasteful number, since it uses less digits than its factorization.

950821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1990.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 950821 is about 975.1005076401. The cubic root of 950821 is about 98.3330677640. Note that the first 3 decimals are identical.

It can be divided in two parts, 950 and 821, that added together give a palindrome (1771).

The spelling of 950821 in words is "nine hundred fifty thousand, eight hundred twenty-one".