142223687 has 4 divisors (see below), whose sum is σ = 143309496. Its totient is φ = 141137880.

The previous prime is 142223677. The next prime is 142223701. The reversal of 142223687 is 786322241.

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

It is a cyclic number.

It is not a de Polignac number, because 142223687 - 2⁶ = 142223623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142223677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 542708 + ... + 542969.

It is an arithmetic number, because the mean of its divisors is an integer number (35827374).

Almost surely, 2^142223687 is an apocalyptic number.

142223687 is a deficient number, since it is larger than the sum of its proper divisors (1085809).

142223687 is a wasteful number, since it uses less digits than its factorization.

142223687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1085808.

The product of its digits is 32256, while the sum is 35.

The square root of 142223687 is about 11925.7572925161. The cubic root of 142223687 is about 521.9841441532.

The spelling of 142223687 in words is "one hundred forty-two million, two hundred twenty-three thousand, six hundred eighty-seven".