142847491 has 16 divisors (see below), whose sum is σ = 155158560. Its totient is φ = 131051520.

The previous prime is 142847489. The next prime is 142847501. The reversal of 142847491 is 194748241.

It is a cyclic number.

It is not a de Polignac number, because 142847491 - 2¹ = 142847489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (142844491) 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 15 ways as a sum of consecutive naturals, for example, 222531 + ... + 223171.

It is an arithmetic number, because the mean of its divisors is an integer number (9697410).

Almost surely, 2^142847491 is an apocalyptic number.

142847491 is a deficient number, since it is larger than the sum of its proper divisors (12311069).

142847491 is a wasteful number, since it uses less digits than its factorization.

142847491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1014.

The product of its digits is 64512, while the sum is 40.

The square root of 142847491 is about 11951.8823203711. The cubic root of 142847491 is about 522.7461852776.

The spelling of 142847491 in words is "one hundred forty-two million, eight hundred forty-seven thousand, four hundred ninety-one".