1311226125 has 64 divisors (see below), whose sum is σ = 2438601984. Its totient is φ = 620160000.

The previous prime is 1311226109. The next prime is 1311226151. The reversal of 1311226125 is 5216221131.

It is a happy number.

1311226125 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1311226125 - 2⁴ = 1311226109 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1311226095 and 1311226104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 165249 + ... + 173001.

It is an arithmetic number, because the mean of its divisors is an integer number (38103156).

Almost surely, 2^1311226125 is an apocalyptic number.

1311226125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1311226125 is a deficient number, since it is larger than the sum of its proper divisors (1127375859).

1311226125 is a wasteful number, since it uses less digits than its factorization.

1311226125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7823 (or 7813 counting only the distinct ones).

The product of its digits is 720, while the sum is 24.

The square root of 1311226125 is about 36210.8564521747. The cubic root of 1311226125 is about 1094.5254506326.

Adding to 1311226125 its reverse (5216221131), we get a palindrome (6527447256).

The spelling of 1311226125 in words is "one billion, three hundred eleven million, two hundred twenty-six thousand, one hundred twenty-five".