2562561 has 6 divisors (see below), whose sum is σ = 3701490. Its totient is φ = 1708368.

The previous prime is 2562559. The next prime is 2562589. The reversal of 2562561 is 1652652.

It can be written as a sum of positive squares in only one way, i.e., 1640961 + 921600 = 1281^2 + 960^2 .

It is not a de Polignac number, because 2562561 - 2¹ = 2562559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2562551) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 142356 + ... + 142373.

It is an arithmetic number, because the mean of its divisors is an integer number (616915).

2^2562561 is an apocalyptic number.

It is an amenable number.

2562561 is a deficient number, since it is larger than the sum of its proper divisors (1138929).

2562561 is a wasteful number, since it uses less digits than its factorization.

2562561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284735 (or 284732 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 2562561 is about 1600.8001124438. The cubic root of 2562561 is about 136.8436777017.

Subtracting from 2562561 its reverse (1652652), we obtain a palindrome (909909).

The spelling of 2562561 in words is "two million, five hundred sixty-two thousand, five hundred sixty-one".