1155420505 has 8 divisors (see below), whose sum is σ = 1416004992. Its totient is φ = 904669488.

The previous prime is 1155420493. The next prime is 1155420527. The reversal of 1155420505 is 5050245511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1155420505 - 2⁷ = 1155420377 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2458107 + ... + 2458576.

It is an arithmetic number, because the mean of its divisors is an integer number (177000624).

Almost surely, 2^1155420505 is an apocalyptic number.

It is an amenable number.

1155420505 is a deficient number, since it is larger than the sum of its proper divisors (260584487).

1155420505 is an equidigital number, since it uses as much as digits as its factorization.

1155420505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4916735.

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

The square root of 1155420505 is about 33991.4769464347. The cubic root of 1155420505 is about 1049.3330624819. Note that the first 3 decimals are identical.

The spelling of 1155420505 in words is "one billion, one hundred fifty-five million, four hundred twenty thousand, five hundred five".