1534721641 has 2 divisors, whose sum is σ = 1534721642. Its totient is φ = 1534721640.

The previous prime is 1534721627. The next prime is 1534721653. The reversal of 1534721641 is 1461274351.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1111555600 + 423166041 = 33340^2 + 20571^2 .

It is an emirp because it is prime and its reverse (1461274351) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1534721641 - 2⁹ = 1534721129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1534721597 and 1534721606.

It is not a weakly prime, because it can be changed into another prime (1534721341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 767360820 + 767360821.

It is an arithmetic number, because the mean of its divisors is an integer number (767360821).

Almost surely, 2^1534721641 is an apocalyptic number.

It is an amenable number.

1534721641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1534721641 is an equidigital number, since it uses as much as digits as its factorization.

1534721641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 34.

The square root of 1534721641 is about 39175.5234936306. The cubic root of 1534721641 is about 1153.4794783916.

Adding to 1534721641 its reverse (1461274351), we get a palindrome (2995995992).

The spelling of 1534721641 in words is "one billion, five hundred thirty-four million, seven hundred twenty-one thousand, six hundred forty-one".