42139800 has 144 divisors (see below), whose sum is σ = 145225080. Its totient is φ = 10944000.

The previous prime is 42139793. The next prime is 42139817. The reversal of 42139800 is 893124.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 73515 + ... + 74085.

Almost surely, 2^42139800 is an apocalyptic number.

42139800 is a gapful number since it is divisible by the number (40) 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 42139800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72612540).

42139800 is an abundant number, since it is smaller than the sum of its proper divisors (103085280).

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

42139800 is a wasteful number, since it uses less digits than its factorization.

42139800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634 (or 622 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 42139800 is about 6491.5175421468. The cubic root of 42139800 is about 347.9879107968.

The spelling of 42139800 in words is "forty-two million, one hundred thirty-nine thousand, eight hundred".