1492718621 has 2 divisors, whose sum is σ = 1492718622. Its totient is φ = 1492718620.

The previous prime is 1492718593. The next prime is 1492718681. The reversal of 1492718621 is 1268172941.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1097265625 + 395452996 = 33125^2 + 19886^2 .

It is a cyclic number.

It is not a de Polignac number, because 1492718621 - 2¹⁸ = 1492456477 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 (1492718681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 746359310 + 746359311.

It is an arithmetic number, because the mean of its divisors is an integer number (746359311).

Almost surely, 2^1492718621 is an apocalyptic number.

It is an amenable number.

1492718621 is a deficient number, since it is larger than the sum of its proper divisors (1).

1492718621 is an equidigital number, since it uses as much as digits as its factorization.

1492718621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 41.

The square root of 1492718621 is about 38635.7169080632. The cubic root of 1492718621 is about 1142.8589933028.

The spelling of 1492718621 in words is "one billion, four hundred ninety-two million, seven hundred eighteen thousand, six hundred twenty-one".