1155145040 has 40 divisors (see below), whose sum is σ = 3069386880. Its totient is φ = 396049536.

The previous prime is 1155145039. The next prime is 1155145063. The reversal of 1155145040 is 405415511.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1030820 + ... + 1031939.

It is an arithmetic number, because the mean of its divisors is an integer number (76734672).

Almost surely, 2^1155145040 is an apocalyptic number.

1155145040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1155145040 is an abundant number, since it is smaller than the sum of its proper divisors (1914241840).

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

1155145040 is a wasteful number, since it uses less digits than its factorization.

1155145040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2062779 (or 2062773 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 26.

The square root of 1155145040 is about 33987.4247332745. The cubic root of 1155145040 is about 1049.2496649929.

The spelling of 1155145040 in words is "one billion, one hundred fifty-five million, one hundred forty-five thousand, forty".