1534765121 has 2 divisors, whose sum is σ = 1534765122. Its totient is φ = 1534765120.

The previous prime is 1534765087. The next prime is 1534765123. The reversal of 1534765121 is 1215674351.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1407075121 + 127690000 = 37511^2 + 11300^2 .

It is an emirp because it is prime and its reverse (1215674351) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1534765121 - 2¹⁴ = 1534748737 is a prime.

Together with 1534765123, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1534765123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 767382560 + 767382561.

It is an arithmetic number, because the mean of its divisors is an integer number (767382561).

Almost surely, 2^1534765121 is an apocalyptic number.

It is an amenable number.

1534765121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1534765121 is an equidigital number, since it uses as much as digits as its factorization.

1534765121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25200, while the sum is 35.

The square root of 1534765121 is about 39176.0784280408. The cubic root of 1534765121 is about 1153.4903713146.

The spelling of 1534765121 in words is "one billion, five hundred thirty-four million, seven hundred sixty-five thousand, one hundred twenty-one".