142728705 has 24 divisors (see below), whose sum is σ = 282739392. Its totient is φ = 65247264.

The previous prime is 142728679. The next prime is 142728713. The reversal of 142728705 is 507827241.

It is not a de Polignac number, because 142728705 - 2¹⁴ = 142712321 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 142728705.

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, 226239 + ... + 226868.

It is an arithmetic number, because the mean of its divisors is an integer number (11780808).

Almost surely, 2^142728705 is an apocalyptic number.

142728705 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

142728705 is a deficient number, since it is larger than the sum of its proper divisors (140010687).

142728705 is a wasteful number, since it uses less digits than its factorization.

142728705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453125 (or 453122 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 36.

The square root of 142728705 is about 11946.9119440967. The cubic root of 142728705 is about 522.6012471394.

The spelling of 142728705 in words is "one hundred forty-two million, seven hundred twenty-eight thousand, seven hundred five".