1542231329 has 2 divisors, whose sum is σ = 1542231330. Its totient is φ = 1542231328.

The previous prime is 1542231293. The next prime is 1542231343. The reversal of 1542231329 is 9231322451.

Together with previous prime (1542231293) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1221642304 + 320589025 = 34952^2 + 17905^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1542231329 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1542231295 and 1542231304.

It is not a weakly prime, because it can be changed into another prime (1542230329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 771115664 + 771115665.

It is an arithmetic number, because the mean of its divisors is an integer number (771115665).

Almost surely, 2^1542231329 is an apocalyptic number.

It is an amenable number.

1542231329 is a deficient number, since it is larger than the sum of its proper divisors (1).

1542231329 is an equidigital number, since it uses as much as digits as its factorization.

1542231329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 32.

The square root of 1542231329 is about 39271.2532140241. The cubic root of 1542231329 is about 1155.3578169624.

The spelling of 1542231329 in words is "one billion, five hundred forty-two million, two hundred thirty-one thousand, three hundred twenty-nine".