1245343513 has 4 divisors (see below), whose sum is σ = 1245419280. Its totient is φ = 1245267748.

The previous prime is 1245343469. The next prime is 1245343559. The reversal of 1245343513 is 3153435421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1245343513 - 2¹³ = 1245335321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1245343013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1723 + ... + 49936.

It is an arithmetic number, because the mean of its divisors is an integer number (311354820).

Almost surely, 2^1245343513 is an apocalyptic number.

It is an amenable number.

1245343513 is a deficient number, since it is larger than the sum of its proper divisors (75767).

1245343513 is an equidigital number, since it uses as much as digits as its factorization.

1245343513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75766.

The product of its digits is 21600, while the sum is 31.

The square root of 1245343513 is about 35289.4249457256. The cubic root of 1245343513 is about 1075.8780676658.

Adding to 1245343513 its reverse (3153435421), we get a palindrome (4398778934).

The spelling of 1245343513 in words is "one billion, two hundred forty-five million, three hundred forty-three thousand, five hundred thirteen".