42116025 has 24 divisors (see below), whose sum is σ = 79580224. Its totient is φ = 19252800.

The previous prime is 42116017. The next prime is 42116051. The reversal of 42116025 is 52061124.

It is not a de Polignac number, because 42116025 - 2³ = 42116017 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 42115992 and 42116010.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39586 + ... + 40635.

Almost surely, 2^42116025 is an apocalyptic number.

It is an amenable number.

42116025 is a deficient number, since it is larger than the sum of its proper divisors (37464199).

42116025 is a wasteful number, since it uses less digits than its factorization.

42116025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80241 (or 80236 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 42116025 is about 6489.6860478763. The cubic root of 42116025 is about 347.9224543163.

Adding to 42116025 its reverse (52061124), we get a palindrome (94177149).

The spelling of 42116025 in words is "forty-two million, one hundred sixteen thousand, twenty-five".