900645 has 16 divisors (see below), whose sum is σ = 1458240. Its totient is φ = 474624.

The previous prime is 900623. The next prime is 900649. The reversal of 900645 is 546009.

It is not a de Polignac number, because 900645 - 2¹² = 896549 is a prime.

It is a super-2 number, since 2×900645² = 1622322832050, which contains 22 as substring.

It is a congruent number.

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

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1146 + ... + 1764.

It is an arithmetic number, because the mean of its divisors is an integer number (91140).

2⁹⁰⁰⁶⁴⁵ is an apocalyptic number.

It is an amenable number.

900645 is a deficient number, since it is larger than the sum of its proper divisors (557595).

900645 is a wasteful number, since it uses less digits than its factorization.

900645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 724.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 900645 is about 949.0231820140. The cubic root of 900645 is about 96.5719974215.

The spelling of 900645 in words is "nine hundred thousand, six hundred forty-five".