142228951 has 4 divisors (see below), whose sum is σ = 143348992. Its totient is φ = 141108912.

The previous prime is 142228949. The next prime is 142228967. The reversal of 142228951 is 159822241.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 142228951 - 2¹ = 142228949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142228901) 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 3 ways as a sum of consecutive naturals, for example, 559830 + ... + 560083.

It is an arithmetic number, because the mean of its divisors is an integer number (35837248).

Almost surely, 2^142228951 is an apocalyptic number.

142228951 is a deficient number, since it is larger than the sum of its proper divisors (1120041).

142228951 is a wasteful number, since it uses less digits than its factorization.

142228951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1120040.

The product of its digits is 11520, while the sum is 34.

The square root of 142228951 is about 11925.9779892468. The cubic root of 142228951 is about 521.9905839868.

The spelling of 142228951 in words is "one hundred forty-two million, two hundred twenty-eight thousand, nine hundred fifty-one".