1245253311 has 16 divisors (see below), whose sum is σ = 1863842400. Its totient is φ = 821608704.

The previous prime is 1245253307. The next prime is 1245253319. The reversal of 1245253311 is 1133525421.

1245253311 is a `hidden beast` number, since 124 + 5 + 2 + 533 + 1 + 1 = 666.

It is not a de Polignac number, because 1245253311 - 2² = 1245253307 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 (1245253319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 235116 + ... + 240353.

It is an arithmetic number, because the mean of its divisors is an integer number (116490150).

Almost surely, 2^1245253311 is an apocalyptic number.

1245253311 is a deficient number, since it is larger than the sum of its proper divisors (618589089).

1245253311 is an equidigital number, since it uses as much as digits as its factorization.

1245253311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475575 (or 475569 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 1245253311 is about 35288.1468909888. The cubic root of 1245253311 is about 1075.8520912463.

Adding to 1245253311 its reverse (1133525421), we get a palindrome (2378778732).

The spelling of 1245253311 in words is "one billion, two hundred forty-five million, two hundred fifty-three thousand, three hundred eleven".