1025615035421 has 2 divisors, whose sum is σ = 1025615035422. Its totient is φ = 1025615035420.

The previous prime is 1025615035331. The next prime is 1025615035441. The reversal of 1025615035421 is 1245305165201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 662742528100 + 362872507321 = 814090^2 + 602389^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1025615035421 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1025615035441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 512807517710 + 512807517711.

It is an arithmetic number, because the mean of its divisors is an integer number (512807517711).

Almost surely, 2^{1025615035421} is an apocalyptic number.

It is an amenable number.

1025615035421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1025615035421 is an equidigital number, since it uses as much as digits as its factorization.

1025615035421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36000, while the sum is 35.

The spelling of 1025615035421 in words is "one trillion, twenty-five billion, six hundred fifteen million, thirty-five thousand, four hundred twenty-one".