42912500 has 36 divisors (see below), whose sum is σ = 93892428. Its totient is φ = 17160000.

The previous prime is 42912491. The next prime is 42912511. The reversal of 42912500 is 521924.

It can be written as a sum of positive squares in 6 ways, for example, as 38019556 + 4892944 = 6166^2 + 2212^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10784 + ... + 14216.

It is an arithmetic number, because the mean of its divisors is an integer number (2608123).

Almost surely, 2^42912500 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42912500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46946214).

42912500 is an abundant number, since it is smaller than the sum of its proper divisors (50979928).

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

42912500 is an equidigital number, since it uses as much as digits as its factorization.

42912500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3462 (or 3440 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 42912500 is about 6550.7633143016. The cubic root of 42912500 is about 350.1020110813.

The spelling of 42912500 in words is "forty-two million, nine hundred twelve thousand, five hundred".