1540032451 has 2 divisors, whose sum is σ = 1540032452. Its totient is φ = 1540032450.

The previous prime is 1540032449. The next prime is 1540032457. The reversal of 1540032451 is 1542300451.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1540032451 - 2¹ = 1540032449 is a prime.

Together with 1540032449, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1540032457) 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, 770016225 + 770016226.

It is an arithmetic number, because the mean of its divisors is an integer number (770016226).

Almost surely, 2^1540032451 is an apocalyptic number.

1540032451 is a deficient number, since it is larger than the sum of its proper divisors (1).

1540032451 is an equidigital number, since it uses as much as digits as its factorization.

1540032451 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 1540032451 is about 39243.2472025443. The cubic root of 1540032451 is about 1154.8084615822.

The spelling of 1540032451 in words is "one billion, five hundred forty million, thirty-two thousand, four hundred fifty-one".