1542864139 has 2 divisors, whose sum is σ = 1542864140. Its totient is φ = 1542864138.

The previous prime is 1542864131. The next prime is 1542864161. The reversal of 1542864139 is 9314682451.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1542864139 - 2³ = 1542864131 is a prime.

It is a super-2 number, since 2×1542864139² = 4760859502824422642, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1542864095 and 1542864104.

It is not a weakly prime, because it can be changed into another prime (1542864131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 771432069 + 771432070.

It is an arithmetic number, because the mean of its divisors is an integer number (771432070).

Almost surely, 2^1542864139 is an apocalyptic number.

1542864139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1542864139 is an equidigital number, since it uses as much as digits as its factorization.

1542864139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 207360, while the sum is 43.

The square root of 1542864139 is about 39279.3092989172. The cubic root of 1542864139 is about 1155.5158179037.

The spelling of 1542864139 in words is "one billion, five hundred forty-two million, eight hundred sixty-four thousand, one hundred thirty-nine".