902001 has 4 divisors (see below), whose sum is σ = 1202672. Its totient is φ = 601332.

The previous prime is 901997. The next prime is 902009. The reversal of 902001 is 100209.

It is a happy number.

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: 100209 = 3 ⋅33403.

It is not a de Polignac number, because 902001 - 2² = 901997 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (902009) 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, 150331 + ... + 150336.

It is an arithmetic number, because the mean of its divisors is an integer number (300668).

2⁹⁰²⁰⁰¹ is an apocalyptic number.

It is an amenable number.

902001 is a deficient number, since it is larger than the sum of its proper divisors (300671).

902001 is a wasteful number, since it uses less digits than its factorization.

902001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300670.

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 902001 is about 949.7373321082. The cubic root of 902001 is about 96.6204389879.

The spelling of 902001 in words is "nine hundred two thousand, one".