1292496901621 has 2 divisors, whose sum is σ = 1292496901622. Its totient is φ = 1292496901620.

The previous prime is 1292496901583. The next prime is 1292496901651. The reversal of 1292496901621 is 1261096942921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 796218920721 + 496277980900 = 892311^2 + 704470^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1292496901621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1292496901651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 646248450810 + 646248450811.

It is an arithmetic number, because the mean of its divisors is an integer number (646248450811).

Almost surely, 2^{1292496901621} is an apocalyptic number.

It is an amenable number.

1292496901621 is a deficient number, since it is larger than the sum of its proper divisors (1).

1292496901621 is an equidigital number, since it uses as much as digits as its factorization.

1292496901621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 839808, while the sum is 52.

The spelling of 1292496901621 in words is "one trillion, two hundred ninety-two billion, four hundred ninety-six million, nine hundred one thousand, six hundred twenty-one".