890545 has 8 divisors (see below), whose sum is σ = 1131624. Its totient is φ = 670464.

The previous prime is 890543. The next prime is 890551. The reversal of 890545 is 545098.

It can be written as a sum of positive squares in 4 ways, for example, as 288369 + 602176 = 537^2 + 776^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 890545 - 2¹ = 890543 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (890543) 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 7 ways as a sum of consecutive naturals, for example, 5154 + ... + 5323.

It is an arithmetic number, because the mean of its divisors is an integer number (141453).

2⁸⁹⁰⁵⁴⁵ is an apocalyptic number.

890545 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

890545 is a deficient number, since it is larger than the sum of its proper divisors (241079).

890545 is a wasteful number, since it uses less digits than its factorization.

890545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10499.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 890545 is about 943.6869184216. The cubic root of 890545 is about 96.2096474463.

The spelling of 890545 in words is "eight hundred ninety thousand, five hundred forty-five".