2142643 has 2 divisors, whose sum is σ = 2142644. Its totient is φ = 2142642.

The previous prime is 2142641. The next prime is 2142659. The reversal of 2142643 is 3462412.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2142643 - 2¹ = 2142641 is a prime.

Together with 2142641, it forms a pair of twin primes.

It is a plaindrome in base 11.

It is not a weakly prime, because it can be changed into another prime (2142641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1071321 + 1071322.

It is an arithmetic number, because the mean of its divisors is an integer number (1071322).

2^2142643 is an apocalyptic number.

2142643 is a deficient number, since it is larger than the sum of its proper divisors (1).

2142643 is an equidigital number, since it uses as much as digits as its factorization.

2142643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 22.

The square root of 2142643 is about 1463.7769638849. The cubic root of 2142643 is about 128.9189042209.

The spelling of 2142643 in words is "two million, one hundred forty-two thousand, six hundred forty-three".