2581532 has 6 divisors (see below), whose sum is σ = 4517688. Its totient is φ = 1290764.

The previous prime is 2581531. The next prime is 2581541. The reversal of 2581532 is 2351852.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2581531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 322688 + ... + 322695.

It is an arithmetic number, because the mean of its divisors is an integer number (752948).

2^2581532 is an apocalyptic number.

It is an amenable number.

2581532 is a deficient number, since it is larger than the sum of its proper divisors (1936156).

2581532 is a wasteful number, since it uses less digits than its factorization.

2581532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645387 (or 645385 counting only the distinct ones).

The product of its digits is 2400, while the sum is 26.

The square root of 2581532 is about 1606.7146604173. The cubic root of 2581532 is about 137.1805387940.

It can be divided in two parts, 2581 and 532, that added together give a palindrome (3113).

The spelling of 2581532 in words is "two million, five hundred eighty-one thousand, five hundred thirty-two".