2571540 has 24 divisors (see below), whose sum is σ = 7200480. Its totient is φ = 685728.

The previous prime is 2571509. The next prime is 2571551. The reversal of 2571540 is 451752.

2571540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×2571540² = 13225635943200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2571540.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21370 + ... + 21489.

It is an arithmetic number, because the mean of its divisors is an integer number (300020).

2^2571540 is an apocalyptic number.

2571540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2571540 is an abundant number, since it is smaller than the sum of its proper divisors (4628940).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2571540 is a wasteful number, since it uses less digits than its factorization.

2571540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42871 (or 42869 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 24.

The square root of 2571540 is about 1603.6021950596. The cubic root of 2571540 is about 137.0033209986.

The spelling of 2571540 in words is "two million, five hundred seventy-one thousand, five hundred forty".