1151205145 has 8 divisors (see below), whose sum is σ = 1389432456. Its totient is φ = 915639936.

The previous prime is 1151205061. The next prime is 1151205149. The reversal of 1151205145 is 5415021511.

It can be written as a sum of positive squares in 4 ways, for example, as 222845184 + 928359961 = 14928^2 + 30469^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1151205145 - 2⁷ = 1151205017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1151205149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 664572 + ... + 666301.

It is an arithmetic number, because the mean of its divisors is an integer number (173679057).

Almost surely, 2^1151205145 is an apocalyptic number.

It is an amenable number.

1151205145 is a deficient number, since it is larger than the sum of its proper divisors (238227311).

1151205145 is a wasteful number, since it uses less digits than its factorization.

1151205145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1331051.

The product of its (nonzero) digits is 1000, while the sum is 25.

The square root of 1151205145 is about 33929.4141564513. The cubic root of 1151205145 is about 1048.0554015858.

Adding to 1151205145 its reverse (5415021511), we get a palindrome (6566226656).

The spelling of 1151205145 in words is "one billion, one hundred fifty-one million, two hundred five thousand, one hundred forty-five".