42250000 has 105 divisors (see below), whose sum is σ = 110799363. Its totient is φ = 15600000.

The previous prime is 42249997. The next prime is 42250009. The reversal of 42250000 is 5224.

It is a happy number.

The square root of 42250000 is 6500.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 10 ways, for example, as 19820304 + 22429696 = 4452^2 + 4736^2 .

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42250009) by changing a digit.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 3249994 + ... + 3250006.

Almost surely, 2^42250000 is an apocalyptic number.

42250000 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

42250000 is the 6500-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42250000

42250000 is an abundant number, since it is smaller than the sum of its proper divisors (68549363).

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

42250000 is an frugal number, since it uses more digits than its factorization.

42250000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64 (or 20 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 13.

The cubic root of 42250000 is about 348.2909883941.

Adding to 42250000 its reverse (5224), we get a palindrome (42255224).

It can be divided in two parts, 4 and 2250000, that multiplied together give a square (9000000 = 3000²).

The spelling of 42250000 in words is "forty-two million, two hundred fifty thousand".