138249142 has 8 divisors (see below), whose sum is σ = 207639576. Its totient is φ = 69035952.

The previous prime is 138249127. The next prime is 138249157. The reversal of 138249142 is 241942831.

138249142 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (138249127) and next prime (138249157).

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

It is a super-2 number, since 2×138249142² = 38225650527472328, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 138249098 and 138249107.

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, 42343 + ... + 45490.

It is an arithmetic number, because the mean of its divisors is an integer number (25954947).

Almost surely, 2^138249142 is an apocalyptic number.

138249142 is a deficient number, since it is larger than the sum of its proper divisors (69390434).

138249142 is an equidigital number, since it uses as much as digits as its factorization.

138249142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88622.

The product of its digits is 13824, while the sum is 34.

The square root of 138249142 is about 11757.9395303769. The cubic root of 138249142 is about 517.0757234131.

The spelling of 138249142 in words is "one hundred thirty-eight million, two hundred forty-nine thousand, one hundred forty-two".