90545 has 16 divisors (see below), whose sum is σ = 134400. Its totient is φ = 57024.

The previous prime is 90533. The next prime is 90547. The reversal of 90545 is 54509.

It is a cyclic number.

It is not a de Polignac number, because 90545 - 2⁴ = 90529 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 90545.

It is not an unprimeable number, because it can be changed into a prime (90547) 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, 356 + ... + 554.

It is an arithmetic number, because the mean of its divisors is an integer number (8400).

2⁹⁰⁵⁴⁵ is an apocalyptic number.

It is an amenable number.

90545 is a deficient number, since it is larger than the sum of its proper divisors (43855).

90545 is a wasteful number, since it uses less digits than its factorization.

90545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 90545 is about 300.9069623654. The cubic root of 90545 is about 44.9043234710.

The spelling of 90545 in words is "ninety thousand, five hundred forty-five".