1155642345 has 96 divisors (see below), whose sum is σ = 2404007424. Its totient is φ = 506073600.

The previous prime is 1155642343. The next prime is 1155642353. The reversal of 1155642345 is 5432465511.

1155642345 is a `hidden beast` number, since 1 + 1 + 5 + 5 + 642 + 3 + 4 + 5 = 666.

1155642345 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1155642345 - 2¹ = 1155642343 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1155642343) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 300535 + ... + 304355.

It is an arithmetic number, because the mean of its divisors is an integer number (25041744).

Almost surely, 2^1155642345 is an apocalyptic number.

1155642345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1155642345 is an abundant number, since it is smaller than the sum of its proper divisors (1248365079).

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

1155642345 is a wasteful number, since it uses less digits than its factorization.

1155642345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3903 (or 3900 counting only the distinct ones).

The product of its digits is 72000, while the sum is 36.

The square root of 1155642345 is about 33994.7399607645. The cubic root of 1155642345 is about 1049.4002152772.

The spelling of 1155642345 in words is "one billion, one hundred fifty-five million, six hundred forty-two thousand, three hundred forty-five".