142499990 has 16 divisors (see below), whose sum is σ = 256925520. Its totient is φ = 56905440.

The previous prime is 142499977. The next prime is 142500023. The reversal of 142499990 is 99994241.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 5321 + ... + 17700.

It is an arithmetic number, because the mean of its divisors is an integer number (16057845).

Almost surely, 2^142499990 is an apocalyptic number.

142499990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

142499990 is a deficient number, since it is larger than the sum of its proper divisors (114425530).

142499990 is a wasteful number, since it uses less digits than its factorization.

142499990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23647.

The product of its (nonzero) digits is 209952, while the sum is 47.

The square root of 142499990 is about 11937.3359674594. The cubic root of 142499990 is about 522.3219511931.

The spelling of 142499990 in words is "one hundred forty-two million, four hundred ninety-nine thousand, nine hundred ninety".