142128513 has 24 divisors (see below), whose sum is σ = 215045376. Its totient is φ = 93798000.

The previous prime is 142128491. The next prime is 142128527. The reversal of 142128513 is 315821241.

142128513 is a `hidden beast` number, since 142 + 1 + 2 + 8 + 513 = 666.

It is not a de Polignac number, because 142128513 - 2⁹ = 142128001 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (142128533) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21648 + ... + 27438.

It is an arithmetic number, because the mean of its divisors is an integer number (8960224).

Almost surely, 2^142128513 is an apocalyptic number.

It is an amenable number.

142128513 is a deficient number, since it is larger than the sum of its proper divisors (72916863).

142128513 is an equidigital number, since it uses as much as digits as its factorization.

142128513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5907 (or 5895 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 142128513 is about 11921.7663540266. The cubic root of 142128513 is about 521.8676834668.

Adding to 142128513 its reverse (315821241), we get a palindrome (457949754).

The spelling of 142128513 in words is "one hundred forty-two million, one hundred twenty-eight thousand, five hundred thirteen".