1247200545 has 8 divisors (see below), whose sum is σ = 1995520896. Its totient is φ = 665173616.

The previous prime is 1247200541. The next prime is 1247200573. The reversal of 1247200545 is 5450027421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1247200545 - 2² = 1247200541 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1247200541) 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 7 ways as a sum of consecutive naturals, for example, 41573337 + ... + 41573366.

It is an arithmetic number, because the mean of its divisors is an integer number (249440112).

Almost surely, 2^1247200545 is an apocalyptic number.

1247200545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1247200545 is a deficient number, since it is larger than the sum of its proper divisors (748320351).

1247200545 is an equidigital number, since it uses as much as digits as its factorization.

1247200545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83146711.

The product of its (nonzero) digits is 11200, while the sum is 30.

The square root of 1247200545 is about 35315.7265959516. The cubic root of 1247200545 is about 1076.4125782123.

Adding to 1247200545 its reverse (5450027421), we get a palindrome (6697227966).

The spelling of 1247200545 in words is "one billion, two hundred forty-seven million, two hundred thousand, five hundred forty-five".