142616749 has 4 divisors (see below), whose sum is σ = 155581920. Its totient is φ = 129651580.

The previous prime is 142616743. The next prime is 142616779. The reversal of 142616749 is 947616241.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 142616749 - 2³ = 142616741 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142616741) 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, 6482569 + ... + 6482590.

It is an arithmetic number, because the mean of its divisors is an integer number (38895480).

Almost surely, 2^142616749 is an apocalyptic number.

It is an amenable number.

142616749 is a deficient number, since it is larger than the sum of its proper divisors (12965171).

142616749 is a wasteful number, since it uses less digits than its factorization.

142616749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12965170.

The product of its digits is 72576, while the sum is 40.

The square root of 142616749 is about 11942.2254626179. The cubic root of 142616749 is about 522.4645690740.

The spelling of 142616749 in words is "one hundred forty-two million, six hundred sixteen thousand, seven hundred forty-nine".