900642 has 8 divisors (see below), whose sum is σ = 1801296. Its totient is φ = 300212.

The previous prime is 900623. The next prime is 900649. The reversal of 900642 is 246009.

It is a sphenic number, since it is the product of 3 distinct primes.

900642 is an admirable number.

It is a super-2 number, since 2×900642² = 1622312024328, which contains 22 as substring.

It is an Ulam number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (900649) by changing a digit.

900642 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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, 75048 + ... + 75059.

It is an arithmetic number, because the mean of its divisors is an integer number (225162).

2⁹⁰⁰⁶⁴² is an apocalyptic number.

900642 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

900642 is a wasteful number, since it uses less digits than its factorization.

900642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150112.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 900642 is about 949.0216014401. The cubic root of 900642 is about 96.5718901960.

The spelling of 900642 in words is "nine hundred thousand, six hundred forty-two".