1225100125 has 8 divisors (see below), whose sum is σ = 1528925112. Its totient is φ = 980080000.

The previous prime is 1225100119. The next prime is 1225100153. The reversal of 1225100125 is 5210015221.

It can be written as a sum of positive squares in 4 ways, for example, as 142229476 + 1082870649 = 11926^2 + 32907^2 .

It is not a de Polignac number, because 1225100125 - 2¹⁵ = 1225067357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4900276 + ... + 4900525.

It is an arithmetic number, because the mean of its divisors is an integer number (191115639).

Almost surely, 2^1225100125 is an apocalyptic number.

It is an amenable number.

1225100125 is a deficient number, since it is larger than the sum of its proper divisors (303824987).

1225100125 is an frugal number, since it uses more digits than its factorization.

1225100125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9800816 (or 9800806 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 1225100125 is about 35001.4303279166. The cubic root of 1225100125 is about 1070.0166314706.

Adding to 1225100125 its reverse (5210015221), we get a palindrome (6435115346).

The spelling of 1225100125 in words is "one billion, two hundred twenty-five million, one hundred thousand, one hundred twenty-five".