1155405155 has 8 divisors (see below), whose sum is σ = 1400214384. Its totient is φ = 915172000.

The previous prime is 1155405149. The next prime is 1155405169. The reversal of 1155405155 is 5515045511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1155405155 - 2¹² = 1155401059 is a prime.

It is a super-2 number, since 2×1155405155² = 2669922144401148050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1143461 + ... + 1144470.

It is an arithmetic number, because the mean of its divisors is an integer number (175026798).

Almost surely, 2^1155405155 is an apocalyptic number.

1155405155 is a deficient number, since it is larger than the sum of its proper divisors (244809229).

1155405155 is a wasteful number, since it uses less digits than its factorization.

1155405155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2288037.

The product of its (nonzero) digits is 12500, while the sum is 32.

The square root of 1155405155 is about 33991.2511537896. The cubic root of 1155405155 is about 1049.3284155925.

The spelling of 1155405155 in words is "one billion, one hundred fifty-five million, four hundred five thousand, one hundred fifty-five".