2142644 has 24 divisors (see below), whose sum is σ = 4361280. Its totient is φ = 902016.

The previous prime is 2142643. The next prime is 2142659. The reversal of 2142644 is 4462412.

It is an Ulam number.

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2142641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1004 + ... + 2300.

It is an arithmetic number, because the mean of its divisors is an integer number (181720).

2^2142644 is an apocalyptic number.

It is an amenable number.

2142644 is an abundant number, since it is smaller than the sum of its proper divisors (2218636).

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

2142644 is a wasteful number, since it uses less digits than its factorization.

2142644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1367 (or 1365 counting only the distinct ones).

The product of its digits is 1536, while the sum is 23.

The square root of 2142644 is about 1463.7773054669. Note that the first 3 decimals coincide. The cubic root of 2142644 is about 128.9189242769.

The spelling of 2142644 in words is "two million, one hundred forty-two thousand, six hundred forty-four".