142188494 has 12 divisors (see below), whose sum is σ = 248104584. Its totient is φ = 60937884.

The previous prime is 142188481. The next prime is 142188503. The reversal of 142188494 is 494881241.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 725354 + ... + 725549.

It is an arithmetic number, because the mean of its divisors is an integer number (20675382).

Almost surely, 2^142188494 is an apocalyptic number.

142188494 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

142188494 is a deficient number, since it is larger than the sum of its proper divisors (105916090).

142188494 is a wasteful number, since it uses less digits than its factorization.

142188494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1450919 (or 1450912 counting only the distinct ones).

The product of its digits is 73728, while the sum is 41.

The square root of 142188494 is about 11924.2816974441. The cubic root of 142188494 is about 521.9410859168.

The spelling of 142188494 in words is "one hundred forty-two million, one hundred eighty-eight thousand, four hundred ninety-four".