142634549 has 2 divisors, whose sum is σ = 142634550. Its totient is φ = 142634548.

The previous prime is 142634461. The next prime is 142634561. The reversal of 142634549 is 945436241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 134397649 + 8236900 = 11593^2 + 2870^2 .

It is an emirp because it is prime and its reverse (945436241) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142634549 is a prime.

It is a super-2 number, since 2×142634549² = 40689229136866802, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142634599) 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 as a sum of consecutive naturals, namely, 71317274 + 71317275.

It is an arithmetic number, because the mean of its divisors is an integer number (71317275).

Almost surely, 2^142634549 is an apocalyptic number.

It is an amenable number.

142634549 is a deficient number, since it is larger than the sum of its proper divisors (1).

142634549 is an equidigital number, since it uses as much as digits as its factorization.

142634549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103680, while the sum is 38.

The square root of 142634549 is about 11942.9706940945. The cubic root of 142634549 is about 522.4863044417.

The spelling of 142634549 in words is "one hundred forty-two million, six hundred thirty-four thousand, five hundred forty-nine".