1155323025 has 72 divisors (see below), whose sum is σ = 2253576000. Its totient is φ = 563552640.

The previous prime is 1155323003. The next prime is 1155323053. The reversal of 1155323025 is 5203235511.

It is a happy number.

It is not a de Polignac number, because 1155323025 - 2⁸ = 1155322769 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1155323025.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 119316 + ... + 128634.

Almost surely, 2^1155323025 is an apocalyptic number.

1155323025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1155323025 is a deficient number, since it is larger than the sum of its proper divisors (1098252975).

1155323025 is a wasteful number, since it uses less digits than its factorization.

1155323025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9383 (or 9375 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 1155323025 is about 33990.0430273338. The cubic root of 1155323025 is about 1049.3035517646.

Adding to 1155323025 its reverse (5203235511), we get a palindrome (6358558536).

The spelling of 1155323025 in words is "one billion, one hundred fifty-five million, three hundred twenty-three thousand, twenty-five".