1245242425421 has 8 divisors (see below), whose sum is σ = 1250851582200. Its totient is φ = 1239634759680.

The previous prime is 1245242425417. The next prime is 1245242425423.

1245242425421 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 4 ways, for example, as 409489927396 + 835752498025 = 639914^2 + 914195^2 .

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 1245242425421 - 2² = 1245242425417 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1245242425423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1318541 + ... + 2056461.

It is an arithmetic number, because the mean of its divisors is an integer number (156356447775).

Almost surely, 2^{1245242425421} is an apocalyptic number.

It is an amenable number.

1245242425421 is a deficient number, since it is larger than the sum of its proper divisors (5609156779).

1245242425421 is an equidigital number, since it uses as much as digits as its factorization.

1245242425421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 745519.

The product of its digits is 204800, while the sum is 38.

The spelling of 1245242425421 in words is "one trillion, two hundred forty-five billion, two hundred forty-two million, four hundred twenty-five thousand, four hundred twenty-one".