1245337521371 has 4 divisors (see below), whose sum is σ = 1251239595144. Its totient is φ = 1239435447600.

The previous prime is 1245337521313. The next prime is 1245337521391. The reversal of 1245337521371 is 1731257335421.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1245337521371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1245337521301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2951036570 + ... + 2951036991.

It is an arithmetic number, because the mean of its divisors is an integer number (312809898786).

Almost surely, 2^{1245337521371} is an apocalyptic number.

1245337521371 is a deficient number, since it is larger than the sum of its proper divisors (5902073773).

1245337521371 is an equidigital number, since it uses as much as digits as its factorization.

1245337521371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5902073772.

The product of its digits is 529200, while the sum is 44.

The spelling of 1245337521371 in words is "one trillion, two hundred forty-five billion, three hundred thirty-seven million, five hundred twenty-one thousand, three hundred seventy-one".