1155405141 has 80 divisors (see below), whose sum is σ = 1966472640. Its totient is φ = 669876480.

The previous prime is 1155405137. The next prime is 1155405149. The reversal of 1155405141 is 1415045511.

1155405141 is a `hidden beast` number, since 115 + 5 + 405 + 141 = 666.

It is not a de Polignac number, because 1155405141 - 2² = 1155405137 is a prime.

It is a super-2 number, since 2×1155405141² = 2669922079698459762, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155405149) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 2030305 + ... + 2030873.

It is an arithmetic number, because the mean of its divisors is an integer number (24580908).

Almost surely, 2^1155405141 is an apocalyptic number.

1155405141 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1155405141 is a deficient number, since it is larger than the sum of its proper divisors (811067499).

1155405141 is a wasteful number, since it uses less digits than its factorization.

1155405141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 688 (or 679 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 27.

The square root of 1155405141 is about 33991.2509478542. The cubic root of 1155405141 is about 1049.3284113543.

The spelling of 1155405141 in words is "one billion, one hundred fifty-five million, four hundred five thousand, one hundred forty-one".