1131503425 has 24 divisors (see below), whose sum is σ = 1599881976. Its totient is φ = 786416640.

The previous prime is 1131503407. The next prime is 1131503473. The reversal of 1131503425 is 5243051311.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 324432144 + 807071281 = 18012^2 + 28409^2 .

It is not a de Polignac number, because 1131503425 - 2¹¹ = 1131501377 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1131503425.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 96874 + ... + 107923.

It is an arithmetic number, because the mean of its divisors is an integer number (66661749).

Almost surely, 2^1131503425 is an apocalyptic number.

It is an amenable number.

1131503425 is a deficient number, since it is larger than the sum of its proper divisors (468378551).

1131503425 is a wasteful number, since it uses less digits than its factorization.

1131503425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204837 (or 204832 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 1131503425 is about 33637.8272930937. The cubic root of 1131503425 is about 1042.0421612319.

Adding to 1131503425 its reverse (5243051311), we get a palindrome (6374554736).

The spelling of 1131503425 in words is "one billion, one hundred thirty-one million, five hundred three thousand, four hundred twenty-five".