1154542139 has 2 divisors, whose sum is σ = 1154542140. Its totient is φ = 1154542138.

The previous prime is 1154542127. The next prime is 1154542153. The reversal of 1154542139 is 9312454511.

It is a weak prime.

It is an emirp because it is prime and its reverse (9312454511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1154542139 - 2¹² = 1154538043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1154542099 and 1154542108.

It is not a weakly prime, because it can be changed into another prime (1154542189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577271069 + 577271070.

It is an arithmetic number, because the mean of its divisors is an integer number (577271070).

Almost surely, 2^1154542139 is an apocalyptic number.

1154542139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1154542139 is an equidigital number, since it uses as much as digits as its factorization.

1154542139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21600, while the sum is 35.

The square root of 1154542139 is about 33978.5541040227. The cubic root of 1154542139 is about 1049.0670894323.

The spelling of 1154542139 in words is "one billion, one hundred fifty-four million, five hundred forty-two thousand, one hundred thirty-nine".