1015120555 has 16 divisors (see below), whose sum is σ = 1226340864. Its totient is φ = 806652000.

The previous prime is 1015120537. The next prime is 1015120559. The reversal of 1015120555 is 5550215101.

It is not a de Polignac number, because 1015120555 - 2⁷ = 1015120427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1015120559) by changing a digit.

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, 580192 + ... + 581938.

It is an arithmetic number, because the mean of its divisors is an integer number (76646304).

Almost surely, 2^1015120555 is an apocalyptic number.

1015120555 is a deficient number, since it is larger than the sum of its proper divisors (211220309).

1015120555 is a wasteful number, since it uses less digits than its factorization.

1015120555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2466.

The product of its (nonzero) digits is 1250, while the sum is 25.

The square root of 1015120555 is about 31860.9565926700. The cubic root of 1015120555 is about 1005.0149928046.

Adding to 1015120555 its reverse (5550215101), we get a palindrome (6565335656).

The spelling of 1015120555 in words is "one billion, fifteen million, one hundred twenty thousand, five hundred fifty-five".