1245142355 has 4 divisors (see below), whose sum is σ = 1494170832. Its totient is φ = 996113880.

The previous prime is 1245142331. The next prime is 1245142361. The reversal of 1245142355 is 5532415421.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-1245142355 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 124514231 + ... + 124514240.

It is an arithmetic number, because the mean of its divisors is an integer number (373542708).

Almost surely, 2^1245142355 is an apocalyptic number.

1245142355 is a deficient number, since it is larger than the sum of its proper divisors (249028477).

1245142355 is an equidigital number, since it uses as much as digits as its factorization.

1245142355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249028476.

The product of its digits is 24000, while the sum is 32.

The square root of 1245142355 is about 35286.5747133382. The cubic root of 1245142355 is about 1075.8201363583.

Adding to 1245142355 its reverse (5532415421), we get a palindrome (6777557776).

The spelling of 1245142355 in words is "one billion, two hundred forty-five million, one hundred forty-two thousand, three hundred fifty-five".