42249999 has 32 divisors (see below), whose sum is σ = 63334656. Its totient is φ = 24837120.

The previous prime is 42249997. The next prime is 42250009. The reversal of 42249999 is 99994224.

42249999 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 6500²-1.

It is not a de Polignac number, because 42249999 - 2¹ = 42249997 is a prime.

42249999 is a modest number, since divided by 9999 gives 4224 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42249997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 214369 + ... + 214565.

It is an arithmetic number, because the mean of its divisors is an integer number (1979208).

Almost surely, 2^42249999 is an apocalyptic number.

42249999 is a deficient number, since it is larger than the sum of its proper divisors (21084657).

42249999 is a wasteful number, since it uses less digits than its factorization.

42249999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375.

The product of its digits is 419904, while the sum is 48.

The square root of 42249999 is about 6499.9999230769. Note that the first 4 decimals coincide. The cubic root of 42249999 is about 348.2909856463.

The spelling of 42249999 in words is "forty-two million, two hundred forty-nine thousand, nine hundred ninety-nine".