971553 has 16 divisors (see below), whose sum is σ = 1440000. Its totient is φ = 577680.

The previous prime is 971549. The next prime is 971561. The reversal of 971553 is 355179.

It is a happy number.

971553 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 971553 - 2² = 971549 is a prime.

It is a Curzon number.

971553 is a lucky number.

It is a nialpdrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 971553.

It is not an unprimeable number, because it can be changed into a prime (971513) 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, 1698 + ... + 2196.

It is an arithmetic number, because the mean of its divisors is an integer number (90000).

2⁹⁷¹⁵⁵³ is an apocalyptic number.

It is an amenable number.

971553 is a deficient number, since it is larger than the sum of its proper divisors (468447).

971553 is a wasteful number, since it uses less digits than its factorization.

971553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572.

The product of its digits is 4725, while the sum is 30.

The square root of 971553 is about 985.6738811595. The cubic root of 971553 is about 99.0426303496.

The spelling of 971553 in words is "nine hundred seventy-one thousand, five hundred fifty-three".