142545541 has 2 divisors, whose sum is σ = 142545542. Its totient is φ = 142545540.

The previous prime is 142545539. The next prime is 142545547. The reversal of 142545541 is 145545241.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 138156516 + 4389025 = 11754^2 + 2095^2 .

It is an emirp because it is prime and its reverse (145545241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 142545541 - 2¹ = 142545539 is a prime.

Together with 142545539, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142545547) 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 as a sum of consecutive naturals, namely, 71272770 + 71272771.

It is an arithmetic number, because the mean of its divisors is an integer number (71272771).

Almost surely, 2^142545541 is an apocalyptic number.

It is an amenable number.

142545541 is a deficient number, since it is larger than the sum of its proper divisors (1).

142545541 is an equidigital number, since it uses as much as digits as its factorization.

142545541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16000, while the sum is 31.

The square root of 142545541 is about 11939.2437365187. The cubic root of 142545541 is about 522.3775997409.

The spelling of 142545541 in words is "one hundred forty-two million, five hundred forty-five thousand, five hundred forty-one".