900002 has 4 divisors (see below), whose sum is σ = 1350006. Its totient is φ = 450000.

The previous prime is 900001. The next prime is 900007. The reversal of 900002 is 200009.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 707281 + 192721 = 841^2 + 439^2 .

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (900001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 224999 + ... + 225002.

2⁹⁰⁰⁰⁰² is an apocalyptic number.

900002 is a deficient number, since it is larger than the sum of its proper divisors (450004).

900002 is a wasteful number, since it uses less digits than its factorization.

900002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450003.

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 900002 is about 948.6843521425. The cubic root of 900002 is about 96.5490099782.

Adding to 900002 its reverse (200009), we get a palindrome (1100011).

The spelling of 900002 in words is "nine hundred thousand, two".