1540242373 has 2 divisors, whose sum is σ = 1540242374. Its totient is φ = 1540242372.

The previous prime is 1540242359. The next prime is 1540242419. The reversal of 1540242373 is 3732420451.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1306244164 + 233998209 = 36142^2 + 15297^2 .

It is a cyclic number.

It is not a de Polignac number, because 1540242373 - 2⁹ = 1540241861 is a prime.

It is a super-2 number, since 2×1540242373² = 4744693135169342258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1540242323) 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, 770121186 + 770121187.

It is an arithmetic number, because the mean of its divisors is an integer number (770121187).

Almost surely, 2^1540242373 is an apocalyptic number.

It is an amenable number.

1540242373 is a deficient number, since it is larger than the sum of its proper divisors (1).

1540242373 is an equidigital number, since it uses as much as digits as its factorization.

1540242373 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 31.

The square root of 1540242373 is about 39245.9217371691. The cubic root of 1540242373 is about 1154.8609298896.

It can be divided in two parts, 15402 and 42373, that added together give a palindrome (57775).

The spelling of 1540242373 in words is "one billion, five hundred forty million, two hundred forty-two thousand, three hundred seventy-three".