1225501625 has 8 divisors (see below), whose sum is σ = 1529426184. Its totient is φ = 980401200.

The previous prime is 1225501621. The next prime is 1225501681. The reversal of 1225501625 is 5261055221.

It can be written as a sum of positive squares in 4 ways, for example, as 5326864 + 1220174761 = 2308^2 + 34931^2 .

It is not a de Polignac number, because 1225501625 - 2² = 1225501621 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1225501621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4901882 + ... + 4902131.

It is an arithmetic number, because the mean of its divisors is an integer number (191178273).

Almost surely, 2^1225501625 is an apocalyptic number.

It is an amenable number.

1225501625 is a deficient number, since it is larger than the sum of its proper divisors (303924559).

1225501625 is an frugal number, since it uses more digits than its factorization.

1225501625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9804028 (or 9804018 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 29.

The square root of 1225501625 is about 35007.1653379705. The cubic root of 1225501625 is about 1070.1335102860.

Adding to 1225501625 its reverse (5261055221), we get a palindrome (6486556846).

The spelling of 1225501625 in words is "one billion, two hundred twenty-five million, five hundred one thousand, six hundred twenty-five".