142180905 has 8 divisors (see below), whose sum is σ = 227489472. Its totient is φ = 75829808.

The previous prime is 142180897. The next prime is 142180921. The reversal of 142180905 is 509081241.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 142180905 - 2³ = 142180897 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4739349 + ... + 4739378.

It is an arithmetic number, because the mean of its divisors is an integer number (28436184).

Almost surely, 2^142180905 is an apocalyptic number.

142180905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

142180905 is a deficient number, since it is larger than the sum of its proper divisors (85308567).

142180905 is an equidigital number, since it uses as much as digits as its factorization.

142180905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9478735.

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 142180905 is about 11923.9634769652. The cubic root of 142180905 is about 521.9317999301.

The spelling of 142180905 in words is "one hundred forty-two million, one hundred eighty thousand, nine hundred five".