1540079 has 2 divisors, whose sum is σ = 1540080. Its totient is φ = 1540078.

The previous prime is 1540073. The next prime is 1540087. The reversal of 1540079 is 9700451.

It is a weak prime.

It is an emirp because it is prime and its reverse (9700451) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1540079 - 2²⁰ = 491503 is a prime.

It is a Sophie Germain prime.

It is equal to p₁₁₆₉₇₂ and since 1540079 and 116972 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1540073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 770039 + 770040.

It is an arithmetic number, because the mean of its divisors is an integer number (770040).

2^1540079 is an apocalyptic number.

1540079 is a deficient number, since it is larger than the sum of its proper divisors (1).

1540079 is an equidigital number, since it uses as much as digits as its factorization.

1540079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 1540079 is about 1240.9991941980. Note that the first 3 decimals coincide. The cubic root of 1540079 is about 115.4820096540.

The spelling of 1540079 in words is "one million, five hundred forty thousand, seventy-nine".