142561447 has 16 divisors (see below), whose sum is σ = 164749312. Its totient is φ = 120839040.

The previous prime is 142561423. The next prime is 142561451. The reversal of 142561447 is 744165241.

It is a de Polignac number, because none of the positive numbers 2^k-142561447 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142561457) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 422863 + ... + 423199.

It is an arithmetic number, because the mean of its divisors is an integer number (10296832).

Almost surely, 2^142561447 is an apocalyptic number.

142561447 is a deficient number, since it is larger than the sum of its proper divisors (22187865).

142561447 is a wasteful number, since it uses less digits than its factorization.

142561447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 838.

The product of its digits is 26880, while the sum is 34.

The square root of 142561447 is about 11939.9098405306. The cubic root of 142561447 is about 522.3970289213.

The spelling of 142561447 in words is "one hundred forty-two million, five hundred sixty-one thousand, four hundred forty-seven".