1253331225 has 30 divisors (see below), whose sum is σ = 2321606430. Its totient is φ = 668442240.

The previous prime is 1253331223. The next prime is 1253331259. The reversal of 1253331225 is 5221333521.

It is a happy number.

1253331225 is a `hidden beast` number, since 1 + 2 + 533 + 3 + 122 + 5 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 373378329 + 879952896 = 19323^2 + 29664^2 .

It is not a de Polignac number, because 1253331225 - 2¹ = 1253331223 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (1253331221) 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 29 ways as a sum of consecutive naturals, for example, 307440 + ... + 311489.

It is an arithmetic number, because the mean of its divisors is an integer number (77386881).

Almost surely, 2^1253331225 is an apocalyptic number.

1253331225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1253331225 is a deficient number, since it is larger than the sum of its proper divisors (1068275205).

1253331225 is an equidigital number, since it uses as much as digits as its factorization.

1253331225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 618951 (or 618937 counting only the distinct ones).

The product of its digits is 5400, while the sum is 27.

The square root of 1253331225 is about 35402.4183495987. The cubic root of 1253331225 is about 1078.1734171073.

Adding to 1253331225 its reverse (5221333521), we get a palindrome (6474664746).

The spelling of 1253331225 in words is "one billion, two hundred fifty-three million, three hundred thirty-one thousand, two hundred twenty-five".