1240579 has 4 divisors (see below), whose sum is σ = 1244880. Its totient is φ = 1236280.

The previous prime is 1240559. The next prime is 1240607. The reversal of 1240579 is 9750421.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9750421 = 337 ⋅28933.

It is a cyclic number.

It is not a de Polignac number, because 1240579 - 2¹⁹ = 716291 is a prime.

It is an Ulam number.

It is a Duffinian number.

1240579 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1240559) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1684 + ... + 2305.

It is an arithmetic number, because the mean of its divisors is an integer number (311220).

2^1240579 is an apocalyptic number.

1240579 is a deficient number, since it is larger than the sum of its proper divisors (4301).

1240579 is an equidigital number, since it uses as much as digits as its factorization.

1240579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4300.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 1240579 is about 1113.8128208995. The cubic root of 1240579 is about 107.4504260336.

The spelling of 1240579 in words is "one million, two hundred forty thousand, five hundred seventy-nine".