1235045455421 has 2 divisors, whose sum is σ = 1235045455422. Its totient is φ = 1235045455420.

The previous prime is 1235045455409. The next prime is 1235045455451. The reversal of 1235045455421 is 1245545405321.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 943499452921 + 291546002500 = 971339^2 + 539950^2 .

It is a cyclic number.

It is not a de Polignac number, because 1235045455421 - 2¹⁰ = 1235045454397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1235045455451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 617522727710 + 617522727711.

It is an arithmetic number, because the mean of its divisors is an integer number (617522727711).

Almost surely, 2^{1235045455421} is an apocalyptic number.

It is an amenable number.

1235045455421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1235045455421 is an equidigital number, since it uses as much as digits as its factorization.

1235045455421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480000, while the sum is 41.

The spelling of 1235045455421 in words is "one trillion, two hundred thirty-five billion, forty-five million, four hundred fifty-five thousand, four hundred twenty-one".