20417125 has 8 divisors (see below), whose sum is σ = 25480728. Its totient is φ = 16333600.

The previous prime is 20417107. The next prime is 20417143. The reversal of 20417125 is 52171402.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20417107) and next prime (20417143).

It can be written as a sum of positive squares in 4 ways, for example, as 471969 + 19945156 = 687^2 + 4466^2 .

It is not a de Polignac number, because 20417125 - 2¹¹ = 20415077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20417096 and 20417105.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81544 + ... + 81793.

It is an arithmetic number, because the mean of its divisors is an integer number (3185091).

Almost surely, 2^20417125 is an apocalyptic number.

20417125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20417125 is a deficient number, since it is larger than the sum of its proper divisors (5063603).

20417125 is an equidigital number, since it uses as much as digits as its factorization.

20417125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163352 (or 163342 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 20417125 is about 4518.5312879297. The cubic root of 20417125 is about 273.3158781569.

Adding to 20417125 its reverse (52171402), we get a palindrome (72588527).

The spelling of 20417125 in words is "twenty million, four hundred seventeen thousand, one hundred twenty-five".