12209725 has 24 divisors (see below), whose sum is σ = 17097120. Its totient is φ = 8568000.

The previous prime is 12209683. The next prime is 12209737. The reversal of 12209725 is 52790221.

It is not a de Polignac number, because 12209725 - 2¹¹ = 12207677 is a prime.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 12209693 and 12209702.

It is a congruent number.

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, 7210 + ... + 8740.

It is an arithmetic number, because the mean of its divisors is an integer number (712380).

Almost surely, 2^12209725 is an apocalyptic number.

It is an amenable number.

12209725 is a deficient number, since it is larger than the sum of its proper divisors (4887395).

12209725 is a wasteful number, since it uses less digits than its factorization.

12209725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1581 (or 1576 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 12209725 is about 3494.2416916979. The cubic root of 12209725 is about 230.2689041402.

Adding to 12209725 its reverse (52790221), we get a palindrome (64999946).

The spelling of 12209725 in words is "twelve million, two hundred nine thousand, seven hundred twenty-five".