1235421555461 has 2 divisors, whose sum is σ = 1235421555462. Its totient is φ = 1235421555460.

The previous prime is 1235421555443. The next prime is 1235421555481. The reversal of 1235421555461 is 1645551245321.

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., 1000962231361 + 234459324100 = 1000481^2 + 484210^2 .

It is a cyclic number.

It is not a de Polignac number, because 1235421555461 - 2¹⁸ = 1235421293317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1235421555481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 617710777730 + 617710777731.

It is an arithmetic number, because the mean of its divisors is an integer number (617710777731).

Almost surely, 2^{1235421555461} is an apocalyptic number.

It is an amenable number.

1235421555461 is a deficient number, since it is larger than the sum of its proper divisors (1).

1235421555461 is an equidigital number, since it uses as much as digits as its factorization.

1235421555461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 720000, while the sum is 44.

The spelling of 1235421555461 in words is "one trillion, two hundred thirty-five billion, four hundred twenty-one million, five hundred fifty-five thousand, four hundred sixty-one".