142420546 has 4 divisors (see below), whose sum is σ = 213630822. Its totient is φ = 71210272.

The previous prime is 142420529. The next prime is 142420547. The reversal of 142420546 is 645024241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 645024241 = 937 ⋅688393.

It can be written as a sum of positive squares in only one way, i.e., 133148521 + 9272025 = 11539^2 + 3045^2 .

It is a super-2 number, since 2×142420546² = 40567223845876232, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (142420547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35605135 + ... + 35605138.

Almost surely, 2^142420546 is an apocalyptic number.

142420546 is a deficient number, since it is larger than the sum of its proper divisors (71210276).

142420546 is an equidigital number, since it uses as much as digits as its factorization.

142420546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71210275.

The product of its (nonzero) digits is 7680, while the sum is 28.

The square root of 142420546 is about 11934.0079604465. The cubic root of 142420546 is about 522.2248680080.

Adding to 142420546 its reverse (645024241), we get a palindrome (787444787).

The spelling of 142420546 in words is "one hundred forty-two million, four hundred twenty thousand, five hundred forty-six".