142919851 has 4 divisors (see below), whose sum is σ = 142997400. Its totient is φ = 142842304.

The previous prime is 142919837. The next prime is 142919857. The reversal of 142919851 is 158919241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 158919241 = 13 ⋅12224557.

It is a cyclic number.

It is not a de Polignac number, because 142919851 - 2¹⁵ = 142887083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142919857) 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, 35941 + ... + 39718.

It is an arithmetic number, because the mean of its divisors is an integer number (35749350).

Almost surely, 2^142919851 is an apocalyptic number.

142919851 is a deficient number, since it is larger than the sum of its proper divisors (77549).

142919851 is an equidigital number, since it uses as much as digits as its factorization.

142919851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77548.

The product of its digits is 25920, while the sum is 40.

The square root of 142919851 is about 11954.9090753548. The cubic root of 142919851 is about 522.8344368073.

It can be divided in two parts, 14291 and 9851, that added together give a palindrome (24142).

The spelling of 142919851 in words is "one hundred forty-two million, nine hundred nineteen thousand, eight hundred fifty-one".