142012547 has 4 divisors (see below), whose sum is σ = 143034360. Its totient is φ = 140990736.

The previous prime is 142012529. The next prime is 142012573. The reversal of 142012547 is 745210241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 745210241 = 5821 ⋅128021.

It is a cyclic number.

It is not a de Polignac number, because 142012547 - 2¹⁴ = 141996163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142012447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 510698 + ... + 510975.

It is an arithmetic number, because the mean of its divisors is an integer number (35758590).

Almost surely, 2^142012547 is an apocalyptic number.

142012547 is a deficient number, since it is larger than the sum of its proper divisors (1021813).

142012547 is a wasteful number, since it uses less digits than its factorization.

142012547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1021812.

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 142012547 is about 11916.9017366092. The cubic root of 142012547 is about 521.7257101368.

Adding to 142012547 its reverse (745210241), we get a palindrome (887222788).

The spelling of 142012547 in words is "one hundred forty-two million, twelve thousand, five hundred forty-seven".