142775747 has 8 divisors (see below), whose sum is σ = 151080960. Its totient is φ = 134549640.

The previous prime is 142775723. The next prime is 142775749. The reversal of 142775747 is 747577241.

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

It is not a de Polignac number, because 142775747 - 2⁶ = 142775683 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 142775698 and 142775707.

It is not an unprimeable number, because it can be changed into a prime (142775749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16043 + ... + 23300.

It is an arithmetic number, because the mean of its divisors is an integer number (18885120).

Almost surely, 2^142775747 is an apocalyptic number.

142775747 is a deficient number, since it is larger than the sum of its proper divisors (8305213).

142775747 is a wasteful number, since it uses less digits than its factorization.

142775747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39553.

The product of its digits is 384160, while the sum is 44.

The square root of 142775747 is about 11948.8805751836. The cubic root of 142775747 is about 522.6586556041.

The spelling of 142775747 in words is "one hundred forty-two million, seven hundred seventy-five thousand, seven hundred forty-seven".