42345454321 has 2 divisors, whose sum is σ = 42345454322. Its totient is φ = 42345454320.

The previous prime is 42345454303. The next prime is 42345454331. The reversal of 42345454321 is 12345454324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42338823696 + 6630625 = 205764^2 + 2575^2 .

It is a cyclic number.

It is not a de Polignac number, because 42345454321 - 2⁵ = 42345454289 is a prime.

It is not a weakly prime, because it can be changed into another prime (42345454331) 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 as a sum of consecutive naturals, namely, 21172727160 + 21172727161.

It is an arithmetic number, because the mean of its divisors is an integer number (21172727161).

Almost surely, 2^42345454321 is an apocalyptic number.

It is an amenable number.

42345454321 is a deficient number, since it is larger than the sum of its proper divisors (1).

42345454321 is an equidigital number, since it uses as much as digits as its factorization.

42345454321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 230400, while the sum is 37.

The spelling of 42345454321 in words is "forty-two billion, three hundred forty-five million, four hundred fifty-four thousand, three hundred twenty-one".