142120451 has 16 divisors (see below), whose sum is σ = 157852800. Its totient is φ = 126878400.

The previous prime is 142120421. The next prime is 142120457. The reversal of 142120451 is 154021241.

It is a happy number.

It is not a de Polignac number, because 142120451 - 2¹⁸ = 141858307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142120457) 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 in 15 ways as a sum of consecutive naturals, for example, 174836 + ... + 175646.

It is an arithmetic number, because the mean of its divisors is an integer number (9865800).

Almost surely, 2^142120451 is an apocalyptic number.

142120451 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

142120451 is a deficient number, since it is larger than the sum of its proper divisors (15732349).

142120451 is a wasteful number, since it uses less digits than its factorization.

142120451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1090.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 142120451 is about 11921.4282281948. The cubic root of 142120451 is about 521.8578159257.

Adding to 142120451 its reverse (154021241), we get a palindrome (296141692).

The spelling of 142120451 in words is "one hundred forty-two million, one hundred twenty thousand, four hundred fifty-one".