142409879 has 8 divisors (see below), whose sum is σ = 144990000. Its totient is φ = 139851712.

The previous prime is 142409873. The next prime is 142409977. The reversal of 142409879 is 978904241.

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 142409879 - 2⁸ = 142409623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142409873) 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, 7892 + ... + 18630.

It is an arithmetic number, because the mean of its divisors is an integer number (18123750).

Almost surely, 2^142409879 is an apocalyptic number.

142409879 is a deficient number, since it is larger than the sum of its proper divisors (2580121).

142409879 is a wasteful number, since it uses less digits than its factorization.

142409879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10977.

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 142409879 is about 11933.5610360026. The cubic root of 142409879 is about 522.2118298336.

The spelling of 142409879 in words is "one hundred forty-two million, four hundred nine thousand, eight hundred seventy-nine".