1155431425 has 12 divisors (see below), whose sum is σ = 1433172780. Its totient is φ = 924062720.

The previous prime is 1155431423. The next prime is 1155431437. The reversal of 1155431425 is 5241345511.

It can be written as a sum of positive squares in 6 ways, for example, as 4322241 + 1151109184 = 2079^2 + 33928^2 .

It is not a de Polignac number, because 1155431425 - 2¹ = 1155431423 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1155431423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 124341 + ... + 133309.

It is an arithmetic number, because the mean of its divisors is an integer number (119431065).

Almost surely, 2^1155431425 is an apocalyptic number.

It is an amenable number.

1155431425 is a deficient number, since it is larger than the sum of its proper divisors (277741355).

1155431425 is an equidigital number, since it uses as much as digits as its factorization.

1155431425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14132 (or 14127 counting only the distinct ones).

The product of its digits is 12000, while the sum is 31.

The square root of 1155431425 is about 33991.6375745565. The cubic root of 1155431425 is about 1049.3363682570.

Adding to 1155431425 its reverse (5241345511), we get a palindrome (6396776936).

The spelling of 1155431425 in words is "one billion, one hundred fifty-five million, four hundred thirty-one thousand, four hundred twenty-five".