1145206545 has 32 divisors (see below), whose sum is σ = 2125360128. Its totient is φ = 515706048.

The previous prime is 1145206511. The next prime is 1145206567. The reversal of 1145206545 is 5456025411.

It is not a de Polignac number, because 1145206545 - 2⁶ = 1145206481 is a prime.

It is a super-2 number, since 2×1145206545² = 2622996061421674050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 74359 + ... + 88428.

It is an arithmetic number, because the mean of its divisors is an integer number (66417504).

Almost surely, 2^1145206545 is an apocalyptic number.

1145206545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1145206545 is a deficient number, since it is larger than the sum of its proper divisors (980153583).

1145206545 is a wasteful number, since it uses less digits than its factorization.

1145206545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162869.

The product of its (nonzero) digits is 24000, while the sum is 33.

The square root of 1145206545 is about 33840.9004756079. The cubic root of 1145206545 is about 1046.2318585031.

It can be divided in two parts, 1145 and 206545, that added together give a triangular number (207690 = T₆₄₄).

The spelling of 1145206545 in words is "one billion, one hundred forty-five million, two hundred six thousand, five hundred forty-five".