2142549 has 12 divisors (see below), whose sum is σ = 3201900. Its totient is φ = 1378944.

The previous prime is 2142541. The next prime is 2142551. The reversal of 2142549 is 9452412.

It can be written as a sum of positive squares in 2 ways, for example, as 562500 + 1580049 = 750^2 + 1257^2 .

It is not a de Polignac number, because 2142549 - 2³ = 2142541 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2142541) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3844 + ... + 4365.

It is an arithmetic number, because the mean of its divisors is an integer number (266825).

2^2142549 is an apocalyptic number.

2142549 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

2142549 is a deficient number, since it is larger than the sum of its proper divisors (1059351).

2142549 is a wasteful number, since it uses less digits than its factorization.

2142549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8244 (or 8241 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 2142549 is about 1463.7448548159. The cubic root of 2142549 is about 128.9170189240.

The spelling of 2142549 in words is "two million, one hundred forty-two thousand, five hundred forty-nine".