142640146 has 8 divisors (see below), whose sum is σ = 233411184. Its totient is φ = 64836420.

The previous prime is 142640123. The next prime is 142640161. The reversal of 142640146 is 641046241.

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

It is a super-2 number, since 2×142640146² = 40692422501802632, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3241800 + ... + 3241843.

It is an arithmetic number, because the mean of its divisors is an integer number (29176398).

Almost surely, 2^142640146 is an apocalyptic number.

142640146 is a deficient number, since it is larger than the sum of its proper divisors (90771038).

142640146 is a wasteful number, since it uses less digits than its factorization.

142640146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6483656.

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 142640146 is about 11943.2050137306. The cubic root of 142640146 is about 522.4931384980.

Adding to 142640146 its reverse (641046241), we get a palindrome (783686387).

The spelling of 142640146 in words is "one hundred forty-two million, six hundred forty thousand, one hundred forty-six".