1245252331 has 16 divisors (see below), whose sum is σ = 1286889120. Its totient is φ = 1204403200.

The previous prime is 1245252319. The next prime is 1245252389. The reversal of 1245252331 is 1332525421.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1245252331 is a prime.

It is a super-2 number, since 2×1245252331² = 3101306735721867122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1245252331.

It is not an unprimeable number, because it can be changed into a prime (1245262331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1889280 + ... + 1889938.

It is an arithmetic number, because the mean of its divisors is an integer number (80430570).

Almost surely, 2^1245252331 is an apocalyptic number.

1245252331 is a deficient number, since it is larger than the sum of its proper divisors (41636789).

1245252331 is a wasteful number, since it uses less digits than its factorization.

1245252331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1166.

The product of its digits is 7200, while the sum is 28.

The square root of 1245252331 is about 35288.1330053036. The cubic root of 1245252331 is about 1075.8518090185.

Adding to 1245252331 its reverse (1332525421), we get a palindrome (2577777752).

The spelling of 1245252331 in words is "one billion, two hundred forty-five million, two hundred fifty-two thousand, three hundred thirty-one".