1540879 has 2 divisors, whose sum is σ = 1540880. Its totient is φ = 1540878.

The previous prime is 1540873. The next prime is 1540901. The reversal of 1540879 is 9780451.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1540879 - 2³ = 1540871 is a prime.

1540879 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1540871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 770439 + 770440.

It is an arithmetic number, because the mean of its divisors is an integer number (770440).

2^1540879 is an apocalyptic number.

1540879 is a deficient number, since it is larger than the sum of its proper divisors (1).

1540879 is an equidigital number, since it uses as much as digits as its factorization.

1540879 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 1540879 is about 1241.3214732695. The cubic root of 1540879 is about 115.5020020517.

The spelling of 1540879 in words is "one million, five hundred forty thousand, eight hundred seventy-nine".