142212651 has 24 divisors (see below), whose sum is σ = 221055120. Its totient is φ = 81087552.

The previous prime is 142212649. The next prime is 142212661. The reversal of 142212651 is 156212241.

It is not a de Polignac number, because 142212651 - 2¹ = 142212649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (142212601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 98805 + ... + 100233.

It is an arithmetic number, because the mean of its divisors is an integer number (9210630).

Almost surely, 2^142212651 is an apocalyptic number.

142212651 is a deficient number, since it is larger than the sum of its proper divisors (78842469).

142212651 is a wasteful number, since it uses less digits than its factorization.

142212651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2123 (or 2116 counting only the distinct ones).

The product of its digits is 960, while the sum is 24.

The square root of 142212651 is about 11925.2945875563. The cubic root of 142212651 is about 521.9706424969.

Adding to 142212651 its reverse (156212241), we get a palindrome (298424892).

The spelling of 142212651 in words is "one hundred forty-two million, two hundred twelve thousand, six hundred fifty-one".