142381409 has 8 divisors (see below), whose sum is σ = 150917760. Its totient is φ = 133862976.

The previous prime is 142381403. The next prime is 142381423. The reversal of 142381409 is 904183241.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 142381409 - 2²⁰ = 141332833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142381403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14132 + ... + 22010.

It is an arithmetic number, because the mean of its divisors is an integer number (18864720).

Almost surely, 2^142381409 is an apocalyptic number.

It is an amenable number.

142381409 is a deficient number, since it is larger than the sum of its proper divisors (8536351).

142381409 is a wasteful number, since it uses less digits than its factorization.

142381409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8959.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 142381409 is about 11932.3681220452. The cubic root of 142381409 is about 522.1770280306.

The spelling of 142381409 in words is "one hundred forty-two million, three hundred eighty-one thousand, four hundred nine".