142421056 has 28 divisors (see below), whose sum is σ = 283829760. Its totient is φ = 70904960.

The previous prime is 142421051. The next prime is 142421113. The reversal of 142421056 is 650124241.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 142421056.

It is not an unprimeable number, because it can be changed into a prime (142421051) 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 3 ways as a sum of consecutive naturals, for example, 10641 + ... + 19951.

Almost surely, 2^142421056 is an apocalyptic number.

142421056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

142421056 is a deficient number, since it is larger than the sum of its proper divisors (141408704).

142421056 is an equidigital number, since it uses as much as digits as its factorization.

142421056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9562 (or 9552 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 142421056 is about 11934.0293279345. The cubic root of 142421056 is about 522.2254913599.

Adding to 142421056 its reverse (650124241), we get a palindrome (792545297).

The spelling of 142421056 in words is "one hundred forty-two million, four hundred twenty-one thousand, fifty-six".