4245343061021 has 8 divisors (see below), whose sum is σ = 4495121826624. Its totient is φ = 3995570151360.

The previous prime is 4245343061017. The next prime is 4245343061077. The reversal of 4245343061021 is 1201603435424.

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 4245343061021 - 2² = 4245343061017 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 (4245343061081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74816 + ... + 2914838.

It is an arithmetic number, because the mean of its divisors is an integer number (561890228328).

Almost surely, 2^{4245343061021} is an apocalyptic number.

It is an amenable number.

4245343061021 is a deficient number, since it is larger than the sum of its proper divisors (249778765603).

4245343061021 is a wasteful number, since it uses less digits than its factorization.

4245343061021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2927971.

The product of its (nonzero) digits is 69120, while the sum is 35.

Adding to 4245343061021 its reverse (1201603435424), we get a palindrome (5446946496445).

The spelling of 4245343061021 in words is "four trillion, two hundred forty-five billion, three hundred forty-three million, sixty-one thousand, twenty-one".