1112155801 has 3 divisors (see below), whose sum is σ = 1112189151. Its totient is φ = 1112122452.

The previous prime is 1112155789. The next prime is 1112155871. The reversal of 1112155801 is 1085512111.

The square root of 1112155801 is 33349.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 1082344201 + 29811600 = 32899^2 + 5460^2 .

It is not a de Polignac number, because 1112155801 - 2⁵ = 1112155769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1112155871) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 16675 + ... + 50023.

It is an arithmetic number, because the mean of its divisors is an integer number (370729717).

Almost surely, 2^1112155801 is an apocalyptic number.

1112155801 is the 33349-th square number.

1112155801 is the 16675-th centered octagonal number.

It is an amenable number.

1112155801 is a deficient number, since it is larger than the sum of its proper divisors (33350).

1112155801 is an frugal number, since it uses more digits than its factorization.

1112155801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66698 (or 33349 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 25.

The cubic root of 1112155801 is about 1036.0686764077.

Multiplying 1112155801 by its sum of digits (25), we get a square (27803895025 = 166745²).

Multiplying 1112155801 by its product of nonzero digits (400), we get a square (444862320400 = 666980²).

Adding to 1112155801 its reverse (1085512111), we get a palindrome (2197667912).

The spelling of 1112155801 in words is "one billion, one hundred twelve million, one hundred fifty-five thousand, eight hundred one".