42020025 has 24 divisors (see below), whose sum is σ = 69665184. Its totient is φ = 22348800.

The previous prime is 42020023. The next prime is 42020029. The reversal of 42020025 is 52002024.

It is not a de Polignac number, because 42020025 - 2¹ = 42020023 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a junction number, because it is equal to n+sod(n) for n = 42019986 and 42020013.

It is not an unprimeable number, because it can be changed into a prime (42020023) 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 23 ways as a sum of consecutive naturals, for example, 42790 + ... + 43760.

It is an arithmetic number, because the mean of its divisors is an integer number (2902716).

Almost surely, 2^42020025 is an apocalyptic number.

It is an amenable number.

42020025 is a deficient number, since it is larger than the sum of its proper divisors (27645159).

42020025 is a wasteful number, since it uses less digits than its factorization.

42020025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1561 (or 1556 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 15.

The square root of 42020025 is about 6482.2854765893. The cubic root of 42020025 is about 347.6578997060.

Adding to 42020025 its reverse (52002024), we get a palindrome (94022049).

The spelling of 42020025 in words is "forty-two million, twenty thousand, twenty-five".