3545421421 has 2 divisors, whose sum is σ = 3545421422. Its totient is φ = 3545421420.

The previous prime is 3545421409. The next prime is 3545421427. The reversal of 3545421421 is 1241245453.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1822009225 + 1723412196 = 42685^2 + 41514^2 .

It is a cyclic number.

It is not a de Polignac number, because 3545421421 - 2⁹ = 3545420909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3545421427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1772710710 + 1772710711.

It is an arithmetic number, because the mean of its divisors is an integer number (1772710711).

Almost surely, 2^3545421421 is an apocalyptic number.

It is an amenable number.

3545421421 is a deficient number, since it is larger than the sum of its proper divisors (1).

3545421421 is an equidigital number, since it uses as much as digits as its factorization.

3545421421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19200, while the sum is 31.

The square root of 3545421421 is about 59543.4414608360. The cubic root of 3545421421 is about 1524.8341908413.

Adding to 3545421421 its reverse (1241245453), we get a palindrome (4786666874).

The spelling of 3545421421 in words is "three billion, five hundred forty-five million, four hundred twenty-one thousand, four hundred twenty-one".