1151512225 has 6 divisors (see below), whose sum is σ = 1427875190. Its totient is φ = 921209760.

The previous prime is 1151512223. The next prime is 1151512231. The reversal of 1151512225 is 5222151511.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 85359121 + 1066153104 = 9239^2 + 32652^2 .

It is not a de Polignac number, because 1151512225 - 2¹ = 1151512223 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 46060489 = 1151512225 / (1 + 1 + 5 + 1 + 5 + 1 + 2 + 2 + 2 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 1151512225.

It is not an unprimeable number, because it can be changed into a prime (1151512223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23030220 + ... + 23030269.

Almost surely, 2^1151512225 is an apocalyptic number.

It is an amenable number.

1151512225 is a deficient number, since it is larger than the sum of its proper divisors (276362965).

1151512225 is an equidigital number, since it uses as much as digits as its factorization.

1151512225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46060499 (or 46060494 counting only the distinct ones).

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

The square root of 1151512225 is about 33933.9391317896. The cubic root of 1151512225 is about 1048.1485816884.

Adding to 1151512225 its reverse (5222151511), we get a palindrome (6373663736).

The spelling of 1151512225 in words is "one billion, one hundred fifty-one million, five hundred twelve thousand, two hundred twenty-five".