8421102045 has 36 divisors (see below), whose sum is σ = 14749349940. Its totient is φ = 4444729344.

The previous prime is 8421102023. The next prime is 8421102049. The reversal of 8421102045 is 5402011248.

It can be written as a sum of positive squares in 6 ways, for example, as 187717401 + 8233384644 = 13701^2 + 90738^2 .

It is not a de Polignac number, because 8421102045 - 2⁷ = 8421101917 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8421102049) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 413461 + ... + 433349.

It is an arithmetic number, because the mean of its divisors is an integer number (409704165).

Almost surely, 2^8421102045 is an apocalyptic number.

It is an amenable number.

8421102045 is a deficient number, since it is larger than the sum of its proper divisors (6328247895).

8421102045 is a wasteful number, since it uses less digits than its factorization.

8421102045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20094 (or 19994 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 27.

The square root of 8421102045 is about 91766.5627829658. The cubic root of 8421102045 is about 2034.4935157300.

The spelling of 8421102045 in words is "eight billion, four hundred twenty-one million, one hundred two thousand, forty-five".