142404407 has 8 divisors (see below), whose sum is σ = 146313216. Its totient is φ = 138532312.

The previous prime is 142404403. The next prime is 142404419. The reversal of 142404407 is 704404241.

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

It is not a de Polignac number, because 142404407 - 2² = 142404403 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 (142404403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1223 + ... + 16920.

It is an arithmetic number, because the mean of its divisors is an integer number (18289152).

Almost surely, 2^142404407 is an apocalyptic number.

142404407 is a deficient number, since it is larger than the sum of its proper divisors (3908809).

142404407 is a wasteful number, since it uses less digits than its factorization.

142404407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18357.

The product of its (nonzero) digits is 3584, while the sum is 26.

The square root of 142404407 is about 11933.3317644319. The cubic root of 142404407 is about 522.2051412065.

Adding to 142404407 its reverse (704404241), we get a palindrome (846808648).

The spelling of 142404407 in words is "one hundred forty-two million, four hundred four thousand, four hundred seven".