142291305 has 24 divisors (see below), whose sum is σ = 265611528. Its totient is φ = 70050816.

The previous prime is 142291297. The next prime is 142291319. The reversal of 142291305 is 503192241.

142291305 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 7080921 + 135210384 = 2661^2 + 11628^2 .

It is not a de Polignac number, because 142291305 - 2³ = 142291297 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 121032 + ... + 122201.

It is an arithmetic number, because the mean of its divisors is an integer number (11067147).

Almost surely, 2^142291305 is an apocalyptic number.

142291305 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

142291305 is a deficient number, since it is larger than the sum of its proper divisors (123320223).

142291305 is a wasteful number, since it uses less digits than its factorization.

142291305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243257 (or 243254 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 142291305 is about 11928.5919118729. The cubic root of 142291305 is about 522.0668540789.

The spelling of 142291305 in words is "one hundred forty-two million, two hundred ninety-one thousand, three hundred five".