1435920087421 has 2 divisors, whose sum is σ = 1435920087422. Its totient is φ = 1435920087420.

The previous prime is 1435920087419. The next prime is 1435920087509. The reversal of 1435920087421 is 1247800295341.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1434870975321 + 1049112100 = 1197861^2 + 32390^2 .

It is a cyclic number.

It is not a de Polignac number, because 1435920087421 - 2¹ = 1435920087419 is a prime.

Together with 1435920087419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1435920007421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 717960043710 + 717960043711.

It is an arithmetic number, because the mean of its divisors is an integer number (717960043711).

Almost surely, 2^{1435920087421} is an apocalyptic number.

It is an amenable number.

1435920087421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1435920087421 is an equidigital number, since it uses as much as digits as its factorization.

1435920087421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 483840, while the sum is 46.

The spelling of 1435920087421 in words is "one trillion, four hundred thirty-five billion, nine hundred twenty million, eighty-seven thousand, four hundred twenty-one".