142245351521 has 16 divisors (see below), whose sum is σ = 178374438144. Its totient is φ = 110422263744.

The previous prime is 142245351503. The next prime is 142245351539. The reversal of 142245351521 is 125153542241.

It is an interprime number because it is at equal distance from previous prime (142245351503) and next prime (142245351539).

It is not a de Polignac number, because 142245351521 - 2¹⁸ = 142245089377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (142245351541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14741741 + ... + 14751386.

It is an arithmetic number, because the mean of its divisors is an integer number (11148402384).

Almost surely, 2^142245351521 is an apocalyptic number.

It is an amenable number.

142245351521 is a deficient number, since it is larger than the sum of its proper divisors (36129086623).

142245351521 is a wasteful number, since it uses less digits than its factorization.

142245351521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29493200.

The product of its digits is 48000, while the sum is 35.

Adding to 142245351521 its reverse (125153542241), we get a palindrome (267398893762).

The spelling of 142245351521 in words is "one hundred forty-two billion, two hundred forty-five million, three hundred fifty-one thousand, five hundred twenty-one".