1240039 has 2 divisors, whose sum is σ = 1240040. Its totient is φ = 1240038.

The previous prime is 1240027. The next prime is 1240081. The reversal of 1240039 is 9300421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1240039 - 2⁵ = 1240007 is a prime.

It is a plaindrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 1239998 and 1240025.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1240009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620019 + 620020.

It is an arithmetic number, because the mean of its divisors is an integer number (620020).

2^1240039 is an apocalyptic number.

1240039 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240039 is an equidigital number, since it uses as much as digits as its factorization.

1240039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 1240039 is about 1113.5703839453. The cubic root of 1240039 is about 107.4348334082.

The spelling of 1240039 in words is "one million, two hundred forty thousand, thirty-nine".