1240019 has 8 divisors (see below), whose sum is σ = 1364160. Its totient is φ = 1117800.

The previous prime is 1240013. The next prime is 1240021. The reversal of 1240019 is 9100421.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1240019 is a prime.

It is a super-2 number, since 2×1240019² = 3075294240722, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 11.

It is a junction number, because it is equal to n+sod(n) for n = 1239979 and 1240006.

It is not an unprimeable number, because it can be changed into a prime (1240013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1124 + ... + 1934.

It is an arithmetic number, because the mean of its divisors is an integer number (170520).

2^1240019 is an apocalyptic number.

1240019 is a deficient number, since it is larger than the sum of its proper divisors (124141).

1240019 is a wasteful number, since it uses less digits than its factorization.

1240019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 961.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 1240019 is about 1113.5614037852. The cubic root of 1240019 is about 107.4342558166.

The spelling of 1240019 in words is "one million, two hundred forty thousand, nineteen".