142866805 has 16 divisors (see below), whose sum is σ = 178072560. Its totient is φ = 109942272.

The previous prime is 142866799. The next prime is 142866809. The reversal of 142866805 is 508668241.

It can be written as a sum of positive squares in 8 ways, for example, as 2515396 + 140351409 = 1586^2 + 11847^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142866805 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142866809) 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, 12127 + ... + 20803.

It is an arithmetic number, because the mean of its divisors is an integer number (11129535).

Almost surely, 2^142866805 is an apocalyptic number.

It is an amenable number.

142866805 is a deficient number, since it is larger than the sum of its proper divisors (35205755).

142866805 is an equidigital number, since it uses as much as digits as its factorization.

142866805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8808.

The product of its (nonzero) digits is 92160, while the sum is 40.

The square root of 142866805 is about 11952.6902829447. The cubic root of 142866805 is about 522.7697438872.

The spelling of 142866805 in words is "one hundred forty-two million, eight hundred sixty-six thousand, eight hundred five".