1240439 has 8 divisors (see below), whose sum is σ = 1325808. Its totient is φ = 1156480.

The previous prime is 1240423. The next prime is 1240483. The reversal of 1240439 is 9340421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1240439 - 2⁴ = 1240423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240039) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1949 + ... + 2505.

It is an arithmetic number, because the mean of its divisors is an integer number (165726).

2^1240439 is an apocalyptic number.

1240439 is a deficient number, since it is larger than the sum of its proper divisors (85369).

1240439 is a wasteful number, since it uses less digits than its factorization.

1240439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 705.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 1240439 is about 1113.7499719416. The cubic root of 1240439 is about 107.4463839357.

The spelling of 1240439 in words is "one million, two hundred forty thousand, four hundred thirty-nine".