902221 has 4 divisors (see below), whose sum is σ = 941472. Its totient is φ = 862972.

The previous prime is 902201. The next prime is 902227. The reversal of 902221 is 122209.

It is a happy number.

902221 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 902221 - 2⁹ = 901709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 902195 and 902204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (902227) 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, 19591 + ... + 19636.

It is an arithmetic number, because the mean of its divisors is an integer number (235368).

2⁹⁰²²²¹ is an apocalyptic number.

It is an amenable number.

902221 is a deficient number, since it is larger than the sum of its proper divisors (39251).

902221 is a wasteful number, since it uses less digits than its factorization.

902221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39250.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 902221 is about 949.8531465442. The cubic root of 902221 is about 96.6282936609.

The spelling of 902221 in words is "nine hundred two thousand, two hundred twenty-one".