20120725 has 6 divisors (see below), whose sum is σ = 24949730. Its totient is φ = 16096560.

The previous prime is 20120719. The next prime is 20120729. The reversal of 20120725 is 52702102.

It can be written as a sum of positive squares in 3 ways, for example, as 3359889 + 16760836 = 1833^2 + 4094^2 .

It is not a de Polignac number, because 20120725 - 2³ = 20120717 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20120729) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 402390 + ... + 402439.

Almost surely, 2^20120725 is an apocalyptic number.

20120725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20120725 is a deficient number, since it is larger than the sum of its proper divisors (4829005).

20120725 is an equidigital number, since it uses as much as digits as its factorization.

20120725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 804839 (or 804834 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 19.

The square root of 20120725 is about 4485.6131130538. The cubic root of 20120725 is about 271.9868298482.

Adding to 20120725 its reverse (52702102), we get a palindrome (72822827).

The spelling of 20120725 in words is "twenty million, one hundred twenty thousand, seven hundred twenty-five".