902021 has 4 divisors (see below), whose sum is σ = 915552. Its totient is φ = 888492.

The previous prime is 902017. The next prime is 902029. The reversal of 902021 is 120209.

902021 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 902021 - 2² = 902017 is a prime.

It is a Duffinian number.

It is a plaindrome in base 11.

It is a junction number, because it is equal to n+sod(n) for n = 901987 and 902005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (902029) 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, 6665 + ... + 6798.

It is an arithmetic number, because the mean of its divisors is an integer number (228888).

2⁹⁰²⁰²¹ is an apocalyptic number.

It is an amenable number.

902021 is a deficient number, since it is larger than the sum of its proper divisors (13531).

902021 is a wasteful number, since it uses less digits than its factorization.

902021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13530.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 902021 is about 949.7478612769. The cubic root of 902021 is about 96.6211531019.

It can be divided in two parts, 9020 and 21, that multiplied together give a triangular number (189420 = T₆₁₅).

The spelling of 902021 in words is "nine hundred two thousand, twenty-one".