1542140497 has 2 divisors, whose sum is σ = 1542140498. Its totient is φ = 1542140496.

The previous prime is 1542140473. The next prime is 1542140521. The reversal of 1542140497 is 7940412451.

It is a balanced prime because it is at equal distance from previous prime (1542140473) and next prime (1542140521).

It can be written as a sum of positive squares in only one way, i.e., 1501640001 + 40500496 = 38751^2 + 6364^2 .

It is a cyclic number.

It is not a de Polignac number, because 1542140497 - 2²³ = 1533751889 is a prime.

It is not a weakly prime, because it can be changed into another prime (1542140437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 771070248 + 771070249.

It is an arithmetic number, because the mean of its divisors is an integer number (771070249).

Almost surely, 2^1542140497 is an apocalyptic number.

It is an amenable number.

1542140497 is a deficient number, since it is larger than the sum of its proper divisors (1).

1542140497 is an equidigital number, since it uses as much as digits as its factorization.

1542140497 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 1542140497 is about 39270.0967276629. The cubic root of 1542140497 is about 1155.3351343468.

The spelling of 1542140497 in words is "one billion, five hundred forty-two million, one hundred forty thousand, four hundred ninety-seven".