1155540125 has 32 divisors (see below), whose sum is σ = 1511288064. Its totient is φ = 880440000.

The previous prime is 1155540109. The next prime is 1155540143. The reversal of 1155540125 is 5210455511.

It is not a de Polignac number, because 1155540125 - 2⁴ = 1155540109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 795650 + ... + 797100.

It is an arithmetic number, because the mean of its divisors is an integer number (47227752).

Almost surely, 2^1155540125 is an apocalyptic number.

It is an amenable number.

1155540125 is a deficient number, since it is larger than the sum of its proper divisors (355747939).

1155540125 is a wasteful number, since it uses less digits than its factorization.

1155540125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1766 (or 1756 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 29.

The square root of 1155540125 is about 33993.2364596253. The cubic root of 1155540125 is about 1049.3692735089.

Adding to 1155540125 its reverse (5210455511), we get a palindrome (6365995636).

The spelling of 1155540125 in words is "one billion, one hundred fifty-five million, five hundred forty thousand, one hundred twenty-five".