1211504325 has 12 divisors (see below), whose sum is σ = 2003020608. Its totient is φ = 646135600.

The previous prime is 1211504321. The next prime is 1211504351. The reversal of 1211504325 is 5234051121.

It is a happy number.

It is not a de Polignac number, because 1211504325 - 2² = 1211504321 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1211504295 and 1211504304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211504321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8076621 + ... + 8076770.

It is an arithmetic number, because the mean of its divisors is an integer number (166918384).

Almost surely, 2^1211504325 is an apocalyptic number.

1211504325 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1211504325 is a deficient number, since it is larger than the sum of its proper divisors (791516283).

1211504325 is a wasteful number, since it uses less digits than its factorization.

1211504325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16153404 (or 16153399 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 1211504325 is about 34806.6706968650. The cubic root of 1211504325 is about 1066.0436550122.

Adding to 1211504325 its reverse (5234051121), we get a palindrome (6445555446).

The spelling of 1211504325 in words is "one billion, two hundred eleven million, five hundred four thousand, three hundred twenty-five".