42921450 has 288 divisors, whose sum is σ = 146240640. Its totient is φ = 8870400.

The previous prime is 42921401. The next prime is 42921451. The reversal of 42921450 is 5412924.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42921451) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 1480036 + ... + 1480064.

It is an arithmetic number, because the mean of its divisors is an integer number (507780).

Almost surely, 2^42921450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42921450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73120320).

42921450 is an abundant number, since it is smaller than the sum of its proper divisors (103319190).

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

42921450 is a wasteful number, since it uses less digits than its factorization.

42921450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94 (or 86 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 42921450 is about 6551.4464051841. The cubic root of 42921450 is about 350.1263489407.

The spelling of 42921450 in words is "forty-two million, nine hundred twenty-one thousand, four hundred fifty".