897521 has 4 divisors (see below), whose sum is σ = 928500. Its totient is φ = 866544.

The previous prime is 897517. The next prime is 897527. The reversal of 897521 is 125798.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 703921 + 193600 = 839^2 + 440^2 .

It is a cyclic number.

It is not a de Polignac number, because 897521 - 2² = 897517 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (897527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15446 + ... + 15503.

It is an arithmetic number, because the mean of its divisors is an integer number (232125).

2⁸⁹⁷⁵²¹ is an apocalyptic number.

It is an amenable number.

897521 is a deficient number, since it is larger than the sum of its proper divisors (30979).

897521 is a wasteful number, since it uses less digits than its factorization.

897521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30978.

The product of its digits is 5040, while the sum is 32.

The square root of 897521 is about 947.3758493861. The cubic root of 897521 is about 96.4602107164.

The spelling of 897521 in words is "eight hundred ninety-seven thousand, five hundred twenty-one".