42750045 has 32 divisors (see below), whose sum is σ = 81849600. Its totient is φ = 21045312.

The previous prime is 42750017. The next prime is 42750049. The reversal of 42750045 is 54005724.

It is not a de Polignac number, because 42750045 - 2⁵ = 42750013 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42750049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10425 + ... + 13934.

It is an arithmetic number, because the mean of its divisors is an integer number (2557800).

Almost surely, 2^42750045 is an apocalyptic number.

42750045 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

42750045 is a deficient number, since it is larger than the sum of its proper divisors (39099555).

42750045 is a wasteful number, since it uses less digits than its factorization.

42750045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24386 (or 24380 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 27.

The square root of 42750045 is about 6538.3518565461. The cubic root of 42750045 is about 349.6596555466.

Adding to 42750045 its reverse (54005724), we get a palindrome (96755769).

The spelling of 42750045 in words is "forty-two million, seven hundred fifty thousand, forty-five".