1542242893 has 2 divisors, whose sum is σ = 1542242894. Its totient is φ = 1542242892.

The previous prime is 1542242869. The next prime is 1542242951. The reversal of 1542242893 is 3982422451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 886729284 + 655513609 = 29778^2 + 25603^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1542242893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1542242803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 771121446 + 771121447.

It is an arithmetic number, because the mean of its divisors is an integer number (771121447).

Almost surely, 2^1542242893 is an apocalyptic number.

It is an amenable number.

1542242893 is a deficient number, since it is larger than the sum of its proper divisors (1).

1542242893 is an equidigital number, since it uses as much as digits as its factorization.

1542242893 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 138240, while the sum is 40.

The square root of 1542242893 is about 39271.4004461262. The cubic root of 1542242893 is about 1155.3607046668.

The spelling of 1542242893 in words is "one billion, five hundred forty-two million, two hundred forty-two thousand, eight hundred ninety-three".