142542451 has 4 divisors (see below), whose sum is σ = 142567600. Its totient is φ = 142517304.

The previous prime is 142542443. The next prime is 142542473. The reversal of 142542451 is 154245241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 154245241 = 1237 ⋅124693.

It is a cyclic number.

It is not a de Polignac number, because 142542451 - 2³ = 142542443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142542151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 370 + ... + 16888.

It is an arithmetic number, because the mean of its divisors is an integer number (35641900).

Almost surely, 2^142542451 is an apocalyptic number.

142542451 is a deficient number, since it is larger than the sum of its proper divisors (25149).

142542451 is an equidigital number, since it uses as much as digits as its factorization.

142542451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25148.

The product of its digits is 6400, while the sum is 28.

The square root of 142542451 is about 11939.1143306361. The cubic root of 142542451 is about 522.3738251380.

Adding to 142542451 its reverse (154245241), we get a palindrome (296787692).

The spelling of 142542451 in words is "one hundred forty-two million, five hundred forty-two thousand, four hundred fifty-one".