1245186545 has 16 divisors (see below), whose sum is σ = 1515141120. Its totient is φ = 982238400.

The previous prime is 1245186541. The next prime is 1245186559. The reversal of 1245186545 is 5456815421.

It is not a de Polignac number, because 1245186545 - 2² = 1245186541 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1245186541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 389855 + ... + 393035.

It is an arithmetic number, because the mean of its divisors is an integer number (94696320).

Almost surely, 2^1245186545 is an apocalyptic number.

It is an amenable number.

1245186545 is a deficient number, since it is larger than the sum of its proper divisors (269954575).

1245186545 is an equidigital number, since it uses as much as digits as its factorization.

1245186545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4256.

The product of its digits is 192000, while the sum is 41.

The square root of 1245186545 is about 35287.2008666032. The cubic root of 1245186545 is about 1075.8328631305.

The spelling of 1245186545 in words is "one billion, two hundred forty-five million, one hundred eighty-six thousand, five hundred forty-five".