1154205045 has 72 divisors (see below), whose sum is σ = 2413573344. Its totient is φ = 527609376.

The previous prime is 1154205007. The next prime is 1154205049. The reversal of 1154205045 is 5405024511.

1154205045 is a `hidden beast` number, since 1 + 154 + 2 + 0 + 504 + 5 = 666.

It is not a de Polignac number, because 1154205045 - 2²⁵ = 1120650613 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1154205049) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 49842 + ... + 69228.

It is an arithmetic number, because the mean of its divisors is an integer number (33521852).

Almost surely, 2^1154205045 is an apocalyptic number.

1154205045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1154205045 is an abundant number, since it is smaller than the sum of its proper divisors (1259368299).

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

1154205045 is an equidigital number, since it uses as much as digits as its factorization.

1154205045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19421 (or 19402 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The square root of 1154205045 is about 33973.5933483640. The cubic root of 1154205045 is about 1048.9649800817.

Adding to 1154205045 its reverse (5405024511), we get a palindrome (6559229556).

The spelling of 1154205045 in words is "one billion, one hundred fifty-four million, two hundred five thousand, forty-five".