42235425 has 30 divisors (see below), whose sum is σ = 78238358. Its totient is φ = 22524480.

The previous prime is 42235411. The next prime is 42235439. The reversal of 42235425 is 52453224.

It is a happy number.

42235425 is a `hidden beast` number, since 4 + 2 + 235 + 425 = 666.

It is an interprime number because it is at equal distance from previous prime (42235411) and next prime (42235439).

It can be written as a sum of positive squares in 3 ways, for example, as 12194064 + 30041361 = 3492^2 + 5481^2 .

It is not a de Polignac number, because 42235425 - 2⁴ = 42235409 is a prime.

It is a super-2 number, since 2×42235425² = 3567662249861250, which contains 22 as substring.

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

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 8404 + ... + 12453.

Almost surely, 2^42235425 is an apocalyptic number.

42235425 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

42235425 is a deficient number, since it is larger than the sum of its proper divisors (36002933).

42235425 is a wasteful number, since it uses less digits than its factorization.

42235425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20879 (or 20865 counting only the distinct ones).

The product of its digits is 9600, while the sum is 27.

The square root of 42235425 is about 6498.8787494459. The cubic root of 42235425 is about 348.2509337590.

Adding to 42235425 its reverse (52453224), we get a palindrome (94688649).

The spelling of 42235425 in words is "forty-two million, two hundred thirty-five thousand, four hundred twenty-five".