1155540525 has 96 divisors (see below), whose sum is σ = 2066117760. Its totient is φ = 568673280.

The previous prime is 1155540523. The next prime is 1155540553. The reversal of 1155540525 is 5250455511.

1155540525 = 4435² + 4436² + ... + 4492².

It is not a de Polignac number, because 1155540525 - 2¹ = 1155540523 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155540521) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 6679339 + ... + 6679511.

It is an arithmetic number, because the mean of its divisors is an integer number (21522060).

Almost surely, 2^1155540525 is an apocalyptic number.

1155540525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1155540525 is a deficient number, since it is larger than the sum of its proper divisors (910577235).

1155540525 is a wasteful number, since it uses less digits than its factorization.

1155540525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335 (or 330 counting only the distinct ones).

The product of its (nonzero) digits is 25000, while the sum is 33.

The square root of 1155540525 is about 33993.2423431481. The cubic root of 1155540525 is about 1049.3693945916.

The spelling of 1155540525 in words is "one billion, one hundred fifty-five million, five hundred forty thousand, five hundred twenty-five".