139242000 has 160 divisors (see below), whose sum is σ = 468898560. Its totient is φ = 35481600.

The previous prime is 139241983. The next prime is 139242001. The reversal of 139242000 is 242931.

It is not an unprimeable number, because it can be changed into a prime (139242001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 137496 + ... + 138504.

It is an arithmetic number, because the mean of its divisors is an integer number (2930616).

Almost surely, 2^139242000 is an apocalyptic number.

139242000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139242000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (234449280).

139242000 is an abundant number, since it is smaller than the sum of its proper divisors (329656560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

139242000 is a wasteful number, since it uses less digits than its factorization.

139242000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1058 (or 1042 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 139242000 is about 11800.0847454584. The cubic root of 139242000 is about 518.3105922436.

Adding to 139242000 its reverse (242931), we get a palindrome (139484931).

The spelling of 139242000 in words is "one hundred thirty-nine million, two hundred forty-two thousand".