142782215 has 4 divisors (see below), whose sum is σ = 171338664. Its totient is φ = 114225768.

The previous prime is 142782203. The next prime is 142782221. The reversal of 142782215 is 512287241.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142782215 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 14278217 + ... + 14278226.

It is an arithmetic number, because the mean of its divisors is an integer number (42834666).

Almost surely, 2^142782215 is an apocalyptic number.

142782215 is a deficient number, since it is larger than the sum of its proper divisors (28556449).

142782215 is an equidigital number, since it uses as much as digits as its factorization.

142782215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28556448.

The product of its digits is 8960, while the sum is 32.

The square root of 142782215 is about 11949.1512250871. The cubic root of 142782215 is about 522.6665479462. Note that the first 3 decimals are identical.

The spelling of 142782215 in words is "one hundred forty-two million, seven hundred eighty-two thousand, two hundred fifteen".