1245051345 has 16 divisors (see below), whose sum is σ = 2060775360. Its totient is φ = 641129664.

The previous prime is 1245051239. The next prime is 1245051347. The reversal of 1245051345 is 5431505421.

It is not a de Polignac number, because 1245051345 - 2¹⁶ = 1244985809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1245051347) 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, 1430659 + ... + 1431528.

It is an arithmetic number, because the mean of its divisors is an integer number (128798460).

Almost surely, 2^1245051345 is an apocalyptic number.

1245051345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1245051345 is a deficient number, since it is larger than the sum of its proper divisors (815724015).

1245051345 is a wasteful number, since it uses less digits than its factorization.

1245051345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2862224.

The product of its (nonzero) digits is 12000, while the sum is 30.

The square root of 1245051345 is about 35285.2851058341. The cubic root of 1245051345 is about 1075.7939244220.

Adding to 1245051345 its reverse (5431505421), we get a palindrome (6676556766).

The spelling of 1245051345 in words is "one billion, two hundred forty-five million, fifty-one thousand, three hundred forty-five".