1145254209 has 16 divisors (see below), whose sum is σ = 1680571584. Its totient is φ = 687948800.

The previous prime is 1145254207. The next prime is 1145254223. The reversal of 1145254209 is 9024525411.

It is not a de Polignac number, because 1145254209 - 2¹ = 1145254207 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a self number, because there is not a number n which added to its sum of digits gives 1145254209.

It is not an unprimeable number, because it can be changed into a prime (1145254207) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 149832 + ... + 157289.

It is an arithmetic number, because the mean of its divisors is an integer number (105035724).

Almost surely, 2^1145254209 is an apocalyptic number.

It is an amenable number.

1145254209 is a deficient number, since it is larger than the sum of its proper divisors (535317375).

1145254209 is a wasteful number, since it uses less digits than its factorization.

1145254209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307248.

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 1145254209 is about 33841.6047048600. The cubic root of 1145254209 is about 1046.2463731784.

It can be divided in two parts, 114525 and 4209, that multiplied together give a triangular number (482035725 = T₃₁₀₄₉).

The spelling of 1145254209 in words is "one billion, one hundred forty-five million, two hundred fifty-four thousand, two hundred nine".