902561 has 4 divisors (see below), whose sum is σ = 984624. Its totient is φ = 820500.

The previous prime is 902521. The next prime is 902563. The reversal of 902561 is 165209.

902561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 902561 - 2¹⁴ = 886177 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 (902563) 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, 41015 + ... + 41036.

It is an arithmetic number, because the mean of its divisors is an integer number (246156).

902561 is a Friedman number, since it can be written as 950^2+61, using all its digits and the basic arithmetic operations.

2⁹⁰²⁵⁶¹ is an apocalyptic number.

It is an amenable number.

902561 is a deficient number, since it is larger than the sum of its proper divisors (82063).

902561 is a wasteful number, since it uses less digits than its factorization.

902561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82062.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 902561 is about 950.0321047207. The cubic root of 902561 is about 96.6404301898.

The spelling of 902561 in words is "nine hundred two thousand, five hundred sixty-one".