1012564155 has 16 divisors (see below), whose sum is σ = 1620622080. Its totient is φ = 539861088.

The previous prime is 1012564127. The next prime is 1012564171. The reversal of 1012564155 is 5514652101.

1012564155 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1012564155 - 2⁷ = 1012564027 is a prime.

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, 47754 + ... + 65616.

It is an arithmetic number, because the mean of its divisors is an integer number (101288880).

Almost surely, 2^1012564155 is an apocalyptic number.

1012564155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1012564155 is a deficient number, since it is larger than the sum of its proper divisors (608057925).

1012564155 is a wasteful number, since it uses less digits than its factorization.

1012564155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21650.

The product of its (nonzero) digits is 6000, while the sum is 30.

The square root of 1012564155 is about 31820.8132359938. The cubic root of 1012564155 is about 1004.1706333029.

The spelling of 1012564155 in words is "one billion, twelve million, five hundred sixty-four thousand, one hundred fifty-five".