142512705 has 12 divisors (see below), whose sum is σ = 247022100. Its totient is φ = 76006752.

The previous prime is 142512697. The next prime is 142512709. The reversal of 142512705 is 507215241.

142512705 is a `hidden beast` number, since 142 + 512 + 7 + 0 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 49660209 + 92852496 = 7047^2 + 9636^2 .

It is not a de Polignac number, because 142512705 - 2³ = 142512697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (142512709) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1583430 + ... + 1583519.

It is an arithmetic number, because the mean of its divisors is an integer number (20585175).

Almost surely, 2^142512705 is an apocalyptic number.

142512705 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

142512705 is a deficient number, since it is larger than the sum of its proper divisors (104509395).

142512705 is a wasteful number, since it uses less digits than its factorization.

142512705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3166960 (or 3166957 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 27.

The square root of 142512705 is about 11937.8685283429. The cubic root of 142512705 is about 522.3374859921.

Adding to 142512705 its reverse (507215241), we get a palindrome (649727946).

The spelling of 142512705 in words is "one hundred forty-two million, five hundred twelve thousand, seven hundred five".