42051825 has 24 divisors (see below), whose sum is σ = 77252000. Its totient is φ = 22427280.

The previous prime is 42051803. The next prime is 42051833. The reversal of 42051825 is 52815024.

It is a happy number.

It is not a de Polignac number, because 42051825 - 2⁷ = 42051697 is a prime.

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

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 30475 + ... + 31824.

Almost surely, 2^42051825 is an apocalyptic number.

42051825 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

42051825 is a deficient number, since it is larger than the sum of its proper divisors (35200175).

42051825 is a wasteful number, since it uses less digits than its factorization.

42051825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62318 (or 62307 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 42051825 is about 6484.7378512936. The cubic root of 42051825 is about 347.7455780095.

Adding to 42051825 its reverse (52815024), we get a palindrome (94866849).

The spelling of 42051825 in words is "forty-two million, fifty-one thousand, eight hundred twenty-five".