1155312405 has 48 divisors (see below), whose sum is σ = 2202520320. Its totient is φ = 556654464.

The previous prime is 1155312397. The next prime is 1155312407. The reversal of 1155312405 is 5042135511.

It is not a de Polignac number, because 1155312405 - 2³ = 1155312397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155312407) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6486 + ... + 48504.

It is an arithmetic number, because the mean of its divisors is an integer number (45885840).

Almost surely, 2^1155312405 is an apocalyptic number.

1155312405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1155312405 is a deficient number, since it is larger than the sum of its proper divisors (1047207915).

1155312405 is a wasteful number, since it uses less digits than its factorization.

1155312405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42090 (or 42087 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The square root of 1155312405 is about 33989.8868047541. The cubic root of 1155312405 is about 1049.3003366067.

Adding to 1155312405 its reverse (5042135511), we get a palindrome (6197447916).

The spelling of 1155312405 in words is "one billion, one hundred fifty-five million, three hundred twelve thousand, four hundred five".