142123547 has 2 divisors, whose sum is σ = 142123548. Its totient is φ = 142123546.

The previous prime is 142123529. The next prime is 142123559. The reversal of 142123547 is 745321241.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 142123547 - 2¹² = 142119451 is a prime.

It is a super-2 number, since 2×142123547² = 40398205223722418, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (142123517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71061773 + 71061774.

It is an arithmetic number, because the mean of its divisors is an integer number (71061774).

Almost surely, 2^142123547 is an apocalyptic number.

142123547 is a deficient number, since it is larger than the sum of its proper divisors (1).

142123547 is an equidigital number, since it uses as much as digits as its factorization.

142123547 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6720, while the sum is 29.

The square root of 142123547 is about 11921.5580777011. The cubic root of 142123547 is about 521.8616053406.

Adding to 142123547 its reverse (745321241), we get a palindrome (887444788).

The spelling of 142123547 in words is "one hundred forty-two million, one hundred twenty-three thousand, five hundred forty-seven".