142529409 has 24 divisors (see below), whose sum is σ = 232100960. Its totient is φ = 86379480.

The previous prime is 142529399. The next prime is 142529419. The reversal of 142529409 is 904925241.

142529409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (142529399) and next prime (142529419).

It is not a de Polignac number, because 142529409 - 2¹⁶ = 142463873 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (142529419) 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, 18547 + ... + 25080.

Almost surely, 2^142529409 is an apocalyptic number.

It is an amenable number.

142529409 is a deficient number, since it is larger than the sum of its proper divisors (89571551).

142529409 is a wasteful number, since it uses less digits than its factorization.

142529409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43658 (or 43641 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 142529409 is about 11938.5681302240. The cubic root of 142529409 is about 522.3578930252.

The spelling of 142529409 in words is "one hundred forty-two million, five hundred twenty-nine thousand, four hundred nine".