1145505276 has 18 divisors (see below), whose sum is σ = 2895582872. Its totient is φ = 381835080.

The previous prime is 1145505233. The next prime is 1145505281. The reversal of 1145505276 is 6725055411.

1145505276 is a `hidden beast` number, since 1 + 145 + 505 + 2 + 7 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 31819591 = 1145505276 / (1 + 1 + 4 + 5 + 5 + 0 + 5 + 2 + 7 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 1145505276.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15909760 + ... + 15909831.

Almost surely, 2^1145505276 is an apocalyptic number.

It is an amenable number.

1145505276 is an abundant number, since it is smaller than the sum of its proper divisors (1750077596).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1145505276 is a wasteful number, since it uses less digits than its factorization.

1145505276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31819601 (or 31819596 counting only the distinct ones).

The product of its (nonzero) digits is 42000, while the sum is 36.

The square root of 1145505276 is about 33845.3139444739. The cubic root of 1145505276 is about 1046.3228216336.

The spelling of 1145505276 in words is "one billion, one hundred forty-five million, five hundred five thousand, two hundred seventy-six".