142678905 has 8 divisors (see below), whose sum is σ = 228286272. Its totient is φ = 76095408.

The previous prime is 142678901. The next prime is 142678997. The reversal of 142678905 is 509876241.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 142678905 - 2² = 142678901 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (142678901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4755949 + ... + 4755978.

It is an arithmetic number, because the mean of its divisors is an integer number (28535784).

Almost surely, 2^142678905 is an apocalyptic number.

142678905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

142678905 is a deficient number, since it is larger than the sum of its proper divisors (85607367).

142678905 is an equidigital number, since it uses as much as digits as its factorization.

142678905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9511935.

The product of its (nonzero) digits is 120960, while the sum is 42.

The square root of 142678905 is about 11944.8275416600. The cubic root of 142678905 is about 522.5404591580.

The spelling of 142678905 in words is "one hundred forty-two million, six hundred seventy-eight thousand, nine hundred five".