142705407 has 8 divisors (see below), whose sum is σ = 204910384. Its totient is φ = 87818688.

The previous prime is 142705403. The next prime is 142705427. The reversal of 142705407 is 704507241.

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

It is not a de Polignac number, because 142705407 - 2² = 142705403 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 (142705403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1829518 + ... + 1829595.

It is an arithmetic number, because the mean of its divisors is an integer number (25613798).

Almost surely, 2^142705407 is an apocalyptic number.

142705407 is a deficient number, since it is larger than the sum of its proper divisors (62204977).

142705407 is a wasteful number, since it uses less digits than its factorization.

142705407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3659129.

The product of its (nonzero) digits is 7840, while the sum is 30.

The square root of 142705407 is about 11945.9368406166. The cubic root of 142705407 is about 522.5728103780.

The spelling of 142705407 in words is "one hundred forty-two million, seven hundred five thousand, four hundred seven".