1240021023 has 4 divisors (see below), whose sum is σ = 1653361368. Its totient is φ = 826680680.

The previous prime is 1240021009. The next prime is 1240021037. The reversal of 1240021023 is 3201200421.

1240021023 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1240021009) and next prime (1240021037).

It is a cyclic number.

It is not a de Polignac number, because 1240021023 - 2⁸ = 1240020767 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1240020993 and 1240021011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240021043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 206670168 + ... + 206670173.

It is an arithmetic number, because the mean of its divisors is an integer number (413340342).

Almost surely, 2^1240021023 is an apocalyptic number.

1240021023 is a deficient number, since it is larger than the sum of its proper divisors (413340345).

1240021023 is an equidigital number, since it uses as much as digits as its factorization.

1240021023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413340344.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 1240021023 is about 35213.9322285938. The cubic root of 1240021023 is about 1074.3431424031.

Adding to 1240021023 its reverse (3201200421), we get a palindrome (4441221444).

The spelling of 1240021023 in words is "one billion, two hundred forty million, twenty-one thousand, twenty-three".