1540001429 has 2 divisors, whose sum is σ = 1540001430. Its totient is φ = 1540001428.

The previous prime is 1540001341. The next prime is 1540001461. The reversal of 1540001429 is 9241000451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 778131025 + 761870404 = 27895^2 + 27602^2 .

It is a cyclic number.

It is not a de Polignac number, because 1540001429 - 2²⁸ = 1271565973 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1540001398 and 1540001407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1540001479) 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, 770000714 + 770000715.

It is an arithmetic number, because the mean of its divisors is an integer number (770000715).

Almost surely, 2^1540001429 is an apocalyptic number.

It is an amenable number.

1540001429 is a deficient number, since it is larger than the sum of its proper divisors (1).

1540001429 is an equidigital number, since it uses as much as digits as its factorization.

1540001429 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 1540001429 is about 39242.8519478389. The cubic root of 1540001429 is about 1154.8007074797.

The spelling of 1540001429 in words is "one billion, five hundred forty million, one thousand, four hundred twenty-nine".