1072256155 has 4 divisors (see below), whose sum is σ = 1286707392. Its totient is φ = 857804920.

The previous prime is 1072256099. The next prime is 1072256219. The reversal of 1072256155 is 5516522701.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5516522701 = 32159 ⋅171539.

It is not a de Polignac number, because 1072256155 - 2⁷ = 1072256027 is a prime.

It is a super-2 number, since 2×1072256155² = 2299466523870768050, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1072256155.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107225611 + ... + 107225620.

It is an arithmetic number, because the mean of its divisors is an integer number (321676848).

Almost surely, 2^1072256155 is an apocalyptic number.

1072256155 is a deficient number, since it is larger than the sum of its proper divisors (214451237).

1072256155 is an equidigital number, since it uses as much as digits as its factorization.

1072256155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214451236.

The product of its (nonzero) digits is 21000, while the sum is 34.

The square root of 1072256155 is about 32745.3226430890. The cubic root of 1072256155 is about 1023.5275005544.

Adding to 1072256155 its reverse (5516522701), we get a palindrome (6588778856).

The spelling of 1072256155 in words is "one billion, seventy-two million, two hundred fifty-six thousand, one hundred fifty-five".