1245345221345 has 16 divisors (see below), whose sum is σ = 1544281873920. Its totient is φ = 963100300800.

The previous prime is 1245345221317. The next prime is 1245345221347. The reversal of 1245345221345 is 5431225435421.

It is not a de Polignac number, because 1245345221345 - 2⁸ = 1245345221089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1245345221347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4180271 + ... + 4468260.

It is an arithmetic number, because the mean of its divisors is an integer number (96517617120).

Almost surely, 2^{1245345221345} is an apocalyptic number.

It is an amenable number.

1245345221345 is a deficient number, since it is larger than the sum of its proper divisors (298936652575).

1245345221345 is an equidigital number, since it uses as much as digits as its factorization.

1245345221345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8649496.

The product of its digits is 576000, while the sum is 41.

The spelling of 1245345221345 in words is "one trillion, two hundred forty-five billion, three hundred forty-five million, two hundred twenty-one thousand, three hundred forty-five".