1151145225 has 36 divisors (see below), whose sum is σ = 2183120316. Its totient is φ = 577827840.

The previous prime is 1151145211. The next prime is 1151145253. The reversal of 1151145225 is 5225411511.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 1121481 + 1150023744 = 1059^2 + 33912^2 .

It is not a de Polignac number, because 1151145225 - 2⁹ = 1151144713 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 146652 + ... + 154301.

It is an arithmetic number, because the mean of its divisors is an integer number (60642231).

Almost surely, 2^1151145225 is an apocalyptic number.

1151145225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1151145225 is a deficient number, since it is larger than the sum of its proper divisors (1031975091).

1151145225 is a wasteful number, since it uses less digits than its factorization.

1151145225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300986 (or 300978 counting only the distinct ones).

The product of its digits is 2000, while the sum is 27.

The square root of 1151145225 is about 33928.5311353144. The cubic root of 1151145225 is about 1048.0372175782.

Adding to 1151145225 its reverse (5225411511), we get a palindrome (6376556736).

The spelling of 1151145225 in words is "one billion, one hundred fifty-one million, one hundred forty-five thousand, two hundred twenty-five".