42104025 has 18 divisors (see below), whose sum is σ = 75413390. Its totient is φ = 22455360.

The previous prime is 42104017. The next prime is 42104033. The reversal of 42104025 is 52040124.

It is an interprime number because it is at equal distance from previous prime (42104017) and next prime (42104033).

It can be written as a sum of positive squares in 3 ways, for example, as 3316041 + 38787984 = 1821^2 + 6228^2 .

It is not a de Polignac number, because 42104025 - 2³ = 42104017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42103989 and 42104007.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 93340 + ... + 93789.

Almost surely, 2^42104025 is an apocalyptic number.

42104025 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

42104025 is a deficient number, since it is larger than the sum of its proper divisors (33309365).

42104025 is a wasteful number, since it uses less digits than its factorization.

42104025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187145 (or 187137 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 42104025 is about 6488.7614380558. The cubic root of 42104025 is about 347.8894069901.

Adding to 42104025 its reverse (52040124), we get a palindrome (94144149).

The spelling of 42104025 in words is "forty-two million, one hundred four thousand, twenty-five".