1542190813 has 2 divisors, whose sum is σ = 1542190814. Its totient is φ = 1542190812.

The previous prime is 1542190807. The next prime is 1542190831. The reversal of 1542190813 is 3180912451.

Together with next prime (1542190831) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 859779684 + 682411129 = 29322^2 + 26123^2 .

It is a cyclic number.

It is not a de Polignac number, because 1542190813 - 2²⁹ = 1005319901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1542196813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 771095406 + 771095407.

It is an arithmetic number, because the mean of its divisors is an integer number (771095407).

Almost surely, 2^1542190813 is an apocalyptic number.

It is an amenable number.

1542190813 is a deficient number, since it is larger than the sum of its proper divisors (1).

1542190813 is an equidigital number, since it uses as much as digits as its factorization.

1542190813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 1542190813 is about 39270.7373625706. The cubic root of 1542190813 is about 1155.3476993952.

The spelling of 1542190813 in words is "one billion, five hundred forty-two million, one hundred ninety thousand, eight hundred thirteen".