11220725 has 6 divisors (see below), whose sum is σ = 13913730. Its totient is φ = 8976560.

The previous prime is 11220707. The next prime is 11220749. The reversal of 11220725 is 52702211.

It can be written as a sum of positive squares in 3 ways, for example, as 521284 + 10699441 = 722^2 + 3271^2 .

It is not a de Polignac number, because 11220725 - 2¹⁰ = 11219701 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11220697 and 11220706.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 224390 + ... + 224439.

It is an arithmetic number, because the mean of its divisors is an integer number (2318955).

Almost surely, 2^11220725 is an apocalyptic number.

It is an amenable number.

11220725 is a deficient number, since it is larger than the sum of its proper divisors (2693005).

11220725 is an equidigital number, since it uses as much as digits as its factorization.

11220725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448839 (or 448834 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 11220725 is about 3349.7350641506. The cubic root of 11220725 is about 223.8757083106.

Adding to 11220725 its reverse (52702211), we get a palindrome (63922936).

The spelling of 11220725 in words is "eleven million, two hundred twenty thousand, seven hundred twenty-five".