2821542 has 16 divisors (see below), whose sum is σ = 5661552. Its totient is φ = 937440.

The previous prime is 2821537. The next prime is 2821543. The reversal of 2821542 is 2451282.

2821542 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 2×2821542² = 15922198515528, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2¹⁶ + 8² + 2¹⁸ + 1 + 5⁹ + 4⁷ + 2¹⁹ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2821543) by changing a digit.

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, 1968 + ... + 3084.

It is an arithmetic number, because the mean of its divisors is an integer number (353847).

2^2821542 is an apocalyptic number.

2821542 is an abundant number, since it is smaller than the sum of its proper divisors (2840010).

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

2821542 is a wasteful number, since it uses less digits than its factorization.

2821542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1543.

The product of its digits is 1280, while the sum is 24.

The square root of 2821542 is about 1679.7446234473. The cubic root of 2821542 is about 141.3065109200.

It can be divided in two parts, 28215 and 42, that multiplied together give a triangular number (1185030 = T₁₅₃₉).

The spelling of 2821542 in words is "two million, eight hundred twenty-one thousand, five hundred forty-two".