1155254520 has 64 divisors (see below), whose sum is σ = 3960875520. Its totient is φ = 264057984.

The previous prime is 1155254519. The next prime is 1155254537. The reversal of 1155254520 is 254525511.

It is a super-2 number, since 2×1155254520² = 2669226011960860800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 686812 + ... + 688491.

It is an arithmetic number, because the mean of its divisors is an integer number (61888680).

Almost surely, 2^1155254520 is an apocalyptic number.

1155254520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1155254520 is an abundant number, since it is smaller than the sum of its proper divisors (2805621000).

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

1155254520 is a wasteful number, since it uses less digits than its factorization.

1155254520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1375324 (or 1375320 counting only the distinct ones).

The product of its (nonzero) digits is 10000, while the sum is 30.

The square root of 1155254520 is about 33989.0352908111. The cubic root of 1155254520 is about 1049.2828118332.

The spelling of 1155254520 in words is "one billion, one hundred fifty-five million, two hundred fifty-four thousand, five hundred twenty".