142738747 has 4 divisors (see below), whose sum is σ = 143478520. Its totient is φ = 141998976.

The previous prime is 142738703. The next prime is 142738751. The reversal of 142738747 is 747837241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 747837241 = 22777 ⋅32833.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142738747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142738147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 369597 + ... + 369982.

It is an arithmetic number, because the mean of its divisors is an integer number (35869630).

Almost surely, 2^142738747 is an apocalyptic number.

142738747 is a deficient number, since it is larger than the sum of its proper divisors (739773).

142738747 is an equidigital number, since it uses as much as digits as its factorization.

142738747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 739772.

The product of its digits is 263424, while the sum is 43.

The square root of 142738747 is about 11947.3322126741. The cubic root of 142738747 is about 522.6135031152.

The spelling of 142738747 in words is "one hundred forty-two million, seven hundred thirty-eight thousand, seven hundred forty-seven".