1155505240 has 32 divisors (see below), whose sum is σ = 2602530000. Its totient is φ = 461732224.

The previous prime is 1155505237. The next prime is 1155505243. The reversal of 1155505240 is 425055511.

It is an interprime number because it is at equal distance from previous prime (1155505237) and next prime (1155505243).

It is a junction number, because it is equal to n+sod(n) for n = 1155505199 and 1155505208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155505243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26586 + ... + 54934.

Almost surely, 2^1155505240 is an apocalyptic number.

1155505240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1155505240 is an abundant number, since it is smaller than the sum of its proper divisors (1447024760).

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

1155505240 is a wasteful number, since it uses less digits than its factorization.

1155505240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29379 (or 29375 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 28.

The square root of 1155505240 is about 33992.7233389736. The cubic root of 1155505240 is about 1049.3587134788.

The spelling of 1155505240 in words is "one billion, one hundred fifty-five million, five hundred five thousand, two hundred forty".