1245215545 has 8 divisors (see below), whose sum is σ = 1707724224. Its totient is φ = 853862064.

The previous prime is 1245215519. The next prime is 1245215557. The reversal of 1245215545 is 5455125421.

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 1245215545 - 2⁷ = 1245215417 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1245215545.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17788759 + ... + 17788828.

It is an arithmetic number, because the mean of its divisors is an integer number (213465528).

Almost surely, 2^1245215545 is an apocalyptic number.

It is an amenable number.

1245215545 is a deficient number, since it is larger than the sum of its proper divisors (462508679).

1245215545 is an equidigital number, since it uses as much as digits as its factorization.

1245215545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35577599.

The product of its digits is 40000, while the sum is 34.

The square root of 1245215545 is about 35287.6117780731. The cubic root of 1245215545 is about 1075.8412150011.

The spelling of 1245215545 in words is "one billion, two hundred forty-five million, two hundred fifteen thousand, five hundred forty-five".