142451021451 has 4 divisors (see below), whose sum is σ = 189934695272. Its totient is φ = 94967347632.

The previous prime is 142451021443. The next prime is 142451021491. The reversal of 142451021451 is 154120154241.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 142451021451 - 2³ = 142451021443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142451021491) 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, 23741836906 + ... + 23741836911.

It is an arithmetic number, because the mean of its divisors is an integer number (47483673818).

Almost surely, 2^142451021451 is an apocalyptic number.

142451021451 is a deficient number, since it is larger than the sum of its proper divisors (47483673821).

142451021451 is an equidigital number, since it uses as much as digits as its factorization.

142451021451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47483673820.

The product of its (nonzero) digits is 6400, while the sum is 30.

Adding to 142451021451 its reverse (154120154241), we get a palindrome (296571175692).

The spelling of 142451021451 in words is "one hundred forty-two billion, four hundred fifty-one million, twenty-one thousand, four hundred fifty-one".