1540499 has 2 divisors, whose sum is σ = 1540500. Its totient is φ = 1540498.

The previous prime is 1540481. The next prime is 1540541. The reversal of 1540499 is 9940451.

It is a weak prime.

It is an emirp because it is prime and its reverse (9940451) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1540499 - 2⁸ = 1540243 is a prime.

It is not a weakly prime, because it can be changed into another prime (1540699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 770249 + 770250.

It is an arithmetic number, because the mean of its divisors is an integer number (770250).

2^1540499 is an apocalyptic number.

1540499 is a deficient number, since it is larger than the sum of its proper divisors (1).

1540499 is an equidigital number, since it uses as much as digits as its factorization.

1540499 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 1540499 is about 1241.1684011447. The cubic root of 1540499 is about 115.4925065258.

The spelling of 1540499 in words is "one million, five hundred forty thousand, four hundred ninety-nine".