1156542255 has 48 divisors (see below), whose sum is σ = 2302035840. Its totient is φ = 531230400.

The previous prime is 1156542251. The next prime is 1156542259. The reversal of 1156542255 is 5522456511.

1156542255 is a `hidden beast` number, since 1 + 1 + 565 + 42 + 2 + 55 = 666.

It is an interprime number because it is at equal distance from previous prime (1156542251) and next prime (1156542259).

It is not a de Polignac number, because 1156542255 - 2² = 1156542251 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1156542251) 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, 52081 + ... + 70890.

It is an arithmetic number, because the mean of its divisors is an integer number (47959080).

Almost surely, 2^1156542255 is an apocalyptic number.

1156542255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1156542255 is a deficient number, since it is larger than the sum of its proper divisors (1145493585).

1156542255 is a wasteful number, since it uses less digits than its factorization.

1156542255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123012 (or 123009 counting only the distinct ones).

The product of its digits is 60000, while the sum is 36.

The square root of 1156542255 is about 34007.9734033065. The cubic root of 1156542255 is about 1049.6725373409.

Adding to 1156542255 its reverse (5522456511), we get a palindrome (6678998766).

The spelling of 1156542255 in words is "one billion, one hundred fifty-six million, five hundred forty-two thousand, two hundred fifty-five".