1245435201601 has 4 divisors (see below), whose sum is σ = 1248636834900. Its totient is φ = 1242233568304.

The previous prime is 1245435201589. The next prime is 1245435201607. The reversal of 1245435201601 is 1061025345421.

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

It can be written as a sum of positive squares in 2 ways, for example, as 580036083201 + 665399118400 = 761601^2 + 815720^2 .

It is a cyclic number.

It is not a de Polignac number, because 1245435201601 - 2³⁵ = 1211075463233 is a prime.

It is a super-2 number, since 2×1245435201601² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1245435201607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1600816066 + ... + 1600816843.

It is an arithmetic number, because the mean of its divisors is an integer number (312159208725).

Almost surely, 2^{1245435201601} is an apocalyptic number.

It is an amenable number.

1245435201601 is a deficient number, since it is larger than the sum of its proper divisors (3201633299).

1245435201601 is an equidigital number, since it uses as much as digits as its factorization.

1245435201601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3201633298.

The product of its (nonzero) digits is 28800, while the sum is 34.

The spelling of 1245435201601 in words is "one trillion, two hundred forty-five billion, four hundred thirty-five million, two hundred one thousand, six hundred one".