1240539 has 8 divisors (see below), whose sum is σ = 1661520. Its totient is φ = 823296.

The previous prime is 1240523. The next prime is 1240543. The reversal of 1240539 is 9350421.

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

It is not a de Polignac number, because 1240539 - 2⁴ = 1240523 is a prime.

1240539 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 7 ways as a sum of consecutive naturals, for example, 34 + ... + 1575.

It is an arithmetic number, because the mean of its divisors is an integer number (207690).

2^1240539 is an apocalyptic number.

1240539 is a deficient number, since it is larger than the sum of its proper divisors (420981).

1240539 is a wasteful number, since it uses less digits than its factorization.

1240539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1869.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 1240539 is about 1113.7948644162. The cubic root of 1240539 is about 107.4492711795.

The spelling of 1240539 in words is "one million, two hundred forty thousand, five hundred thirty-nine".