1155420234 has 32 divisors (see below), whose sum is σ = 2627317440. Its totient is φ = 376182576.

The previous prime is 1155420209. The next prime is 1155420257. The reversal of 1155420234 is 4320245511.

1155420234 is a `hidden beast` number, since 1 + 1 + 5 + 5 + 420 + 234 = 666.

It is a super-2 number, since 2×1155420234² = 2669991834273229512, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 1155420198 and 1155420207.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 246477 + ... + 251120.

It is an arithmetic number, because the mean of its divisors is an integer number (82103670).

Almost surely, 2^1155420234 is an apocalyptic number.

1155420234 is an abundant number, since it is smaller than the sum of its proper divisors (1471897206).

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

1155420234 is a wasteful number, since it uses less digits than its factorization.

1155420234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497651 (or 497645 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 1155420234 is about 33991.4729601410. The cubic root of 1155420234 is about 1049.3329804427.

Adding to 1155420234 its reverse (4320245511), we get a palindrome (5475665745).

The spelling of 1155420234 in words is "one billion, one hundred fifty-five million, four hundred twenty thousand, two hundred thirty-four".