1540242419 has 2 divisors, whose sum is σ = 1540242420. Its totient is φ = 1540242418.

The previous prime is 1540242373. The next prime is 1540242427. The reversal of 1540242419 is 9142420451.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1540242419 is a prime.

It is a super-2 number, since 2×1540242419² = 4744693418573943122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1540242019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 770121209 + 770121210.

It is an arithmetic number, because the mean of its divisors is an integer number (770121210).

Almost surely, 2^1540242419 is an apocalyptic number.

1540242419 is a deficient number, since it is larger than the sum of its proper divisors (1).

1540242419 is an equidigital number, since it uses as much as digits as its factorization.

1540242419 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 1540242419 is about 39245.9223232172. The cubic root of 1540242419 is about 1154.8609413864.

The spelling of 1540242419 in words is "one billion, five hundred forty million, two hundred forty-two thousand, four hundred nineteen".