1155202540 has 48 divisors (see below), whose sum is σ = 2454971904. Its totient is φ = 456580800.

The previous prime is 1155202537. The next prime is 1155202561. The reversal of 1155202540 is 452025511.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 709207 + ... + 710833.

It is an arithmetic number, because the mean of its divisors is an integer number (51145248).

Almost surely, 2^1155202540 is an apocalyptic number.

1155202540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1155202540 is an abundant number, since it is smaller than the sum of its proper divisors (1299769364).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1155202540 is a wasteful number, since it uses less digits than its factorization.

1155202540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2038 (or 2036 counting only the distinct ones).

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

The square root of 1155202540 is about 33988.2706238490. The cubic root of 1155202540 is about 1049.2670743088.

The spelling of 1155202540 in words is "one billion, one hundred fifty-five million, two hundred two thousand, five hundred forty".