1155240025 has 24 divisors (see below), whose sum is σ = 1479548160. Its totient is φ = 894284160.

The previous prime is 1155240013. The next prime is 1155240029. The reversal of 1155240025 is 5200425511.

It is not a de Polignac number, because 1155240025 - 2⁹ = 1155239513 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (1155240029) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 99052 + ... + 110098.

It is an arithmetic number, because the mean of its divisors is an integer number (61647840).

Almost surely, 2^1155240025 is an apocalyptic number.

It is an amenable number.

1155240025 is a deficient number, since it is larger than the sum of its proper divisors (324308135).

1155240025 is a wasteful number, since it uses less digits than its factorization.

1155240025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11193 (or 11188 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 1155240025 is about 33988.8220596125. The cubic root of 1155240025 is about 1049.2784233579.

Adding to 1155240025 its reverse (5200425511), we get a palindrome (6355665536).

The spelling of 1155240025 in words is "one billion, one hundred fifty-five million, two hundred forty thousand, twenty-five".