1145130556 has 12 divisors (see below), whose sum is σ = 2012808168. Its totient is φ = 570042512.

The previous prime is 1145130521. The next prime is 1145130559. The reversal of 1145130556 is 6550315411.

It is a happy number.

It is a super-2 number, since 2×1145130556² = 2622647980569738272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145130559) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 629671 + ... + 631486.

It is an arithmetic number, because the mean of its divisors is an integer number (167734014).

Almost surely, 2^1145130556 is an apocalyptic number.

It is an amenable number.

1145130556 is a deficient number, since it is larger than the sum of its proper divisors (867677612).

1145130556 is a wasteful number, since it uses less digits than its factorization.

1145130556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1261388 (or 1261386 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 31.

The square root of 1145130556 is about 33839.7777179461. Note that the first 4 decimals coincide. The cubic root of 1145130556 is about 1046.2087174457.

Adding to 1145130556 its reverse (6550315411), we get a palindrome (7695445967).

The spelling of 1145130556 in words is "one billion, one hundred forty-five million, one hundred thirty thousand, five hundred fifty-six".