128142523 has 2 divisors, whose sum is σ = 128142524. Its totient is φ = 128142522.

The previous prime is 128142493. The next prime is 128142527. The reversal of 128142523 is 325241821.

It is a strong prime.

It is an emirp because it is prime and its reverse (325241821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 128142523 - 2⁹ = 128142011 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 128142491 and 128142500.

It is not a weakly prime, because it can be changed into another prime (128142527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64071261 + 64071262.

It is an arithmetic number, because the mean of its divisors is an integer number (64071262).

Almost surely, 2^128142523 is an apocalyptic number.

128142523 is a deficient number, since it is larger than the sum of its proper divisors (1).

128142523 is an equidigital number, since it uses as much as digits as its factorization.

128142523 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3840, while the sum is 28.

The square root of 128142523 is about 11320.0054328609. The cubic root of 128142523 is about 504.1554002931.

The spelling of 128142523 in words is "one hundred twenty-eight million, one hundred forty-two thousand, five hundred twenty-three".