2142656 has 14 divisors (see below), whose sum is σ = 4251960. Its totient is φ = 1071296.

The previous prime is 2142643. The next prime is 2142659. The reversal of 2142656 is 6562412.

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 (2142659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16676 + ... + 16803.

2^2142656 is an apocalyptic number.

It is an amenable number.

2142656 is a deficient number, since it is larger than the sum of its proper divisors (2109304).

2142656 is an equidigital number, since it uses as much as digits as its factorization.

2142656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33491 (or 33481 counting only the distinct ones).

The product of its digits is 2880, while the sum is 26.

The square root of 2142656 is about 1463.7814044453. The cubic root of 2142656 is about 128.9191649491.

The spelling of 2142656 in words is "two million, one hundred forty-two thousand, six hundred fifty-six".