1740428732621 has 2 divisors, whose sum is σ = 1740428732622. Its totient is φ = 1740428732620.

The previous prime is 1740428732561. The next prime is 1740428732677. The reversal of 1740428732621 is 1262378240471.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1653410222500 + 87018510121 = 1285850^2 + 294989^2 .

It is a cyclic number.

It is not a de Polignac number, because 1740428732621 - 2¹⁰ = 1740428731597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1740428732681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 870214366310 + 870214366311.

It is an arithmetic number, because the mean of its divisors is an integer number (870214366311).

Almost surely, 2^{1740428732621} is an apocalyptic number.

It is an amenable number.

1740428732621 is a deficient number, since it is larger than the sum of its proper divisors (1).

1740428732621 is an equidigital number, since it uses as much as digits as its factorization.

1740428732621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 903168, while the sum is 47.

The spelling of 1740428732621 in words is "one trillion, seven hundred forty billion, four hundred twenty-eight million, seven hundred thirty-two thousand, six hundred twenty-one".