955221 has 4 divisors (see below), whose sum is σ = 1273632. Its totient is φ = 636812.

The previous prime is 955217. The next prime is 955223. The reversal of 955221 is 122559.

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, and also an emirpimes, since its reverse is a distinct semiprime: 122559 = 3 ⋅40853.

It is a cyclic number.

It is not a de Polignac number, because 955221 - 2² = 955217 is a prime.

It is a D-number.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 955191 and 955200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (955223) 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, 159201 + ... + 159206.

It is an arithmetic number, because the mean of its divisors is an integer number (318408).

2⁹⁵⁵²²¹ is an apocalyptic number.

It is an amenable number.

955221 is a deficient number, since it is larger than the sum of its proper divisors (318411).

955221 is a wasteful number, since it uses less digits than its factorization.

955221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318410.

The product of its digits is 900, while the sum is 24.

The square root of 955221 is about 977.3540811804. The cubic root of 955221 is about 98.4845157620.

It can be divided in two parts, 955 and 221, that added together give a triangular number (1176 = T₄₈).

The spelling of 955221 in words is "nine hundred fifty-five thousand, two hundred twenty-one".