1240023 has 8 divisors (see below), whose sum is σ = 1669248. Its totient is φ = 818744.

The previous prime is 1240021. The next prime is 1240027. The reversal of 1240023 is 3200421.

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 1240023 - 2¹ = 1240021 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 = 1239990 and 1240008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240021) 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, 1611 + ... + 2252.

It is an arithmetic number, because the mean of its divisors is an integer number (208656).

2^1240023 is an apocalyptic number.

1240023 is a deficient number, since it is larger than the sum of its proper divisors (429225).

1240023 is a wasteful number, since it uses less digits than its factorization.

1240023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3973.

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 1240023 is about 1113.5631998230. The cubic root of 1240023 is about 107.4343713355.

Adding to 1240023 its reverse (3200421), we get a palindrome (4440444).

The spelling of 1240023 in words is "one million, two hundred forty thousand, twenty-three".