1145245511 has 4 divisors (see below), whose sum is σ = 1212612912. Its totient is φ = 1077878112.

The previous prime is 1145245499. The next prime is 1145245547. The reversal of 1145245511 is 1155425411.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1145245511 - 2²² = 1141051207 is a prime.

It is a super-2 number, since 2×1145245511² = 2623174560931302242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145245111) 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 3 ways as a sum of consecutive naturals, for example, 33683675 + ... + 33683708.

It is an arithmetic number, because the mean of its divisors is an integer number (303153228).

Almost surely, 2^1145245511 is an apocalyptic number.

1145245511 is a deficient number, since it is larger than the sum of its proper divisors (67367401).

1145245511 is an equidigital number, since it uses as much as digits as its factorization.

1145245511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67367400.

The product of its digits is 4000, while the sum is 29.

The square root of 1145245511 is about 33841.4761941615. The cubic root of 1145245511 is about 1046.2437244872.

The spelling of 1145245511 in words is "one billion, one hundred forty-five million, two hundred forty-five thousand, five hundred eleven".