1240020423 has 12 divisors (see below), whose sum is σ = 1791881208. Its totient is φ = 826338480.

The previous prime is 1240020407. The next prime is 1240020437. The reversal of 1240020423 is 3240200421.

1240020423 is a `hidden beast` number, since 1 + 240 + 0 + 2 + 0 + 423 = 666.

It is not a de Polignac number, because 1240020423 - 2⁴ = 1240020407 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1240020396 and 1240020405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240020403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4440 + ... + 49997.

It is an arithmetic number, because the mean of its divisors is an integer number (149323434).

Almost surely, 2^1240020423 is an apocalyptic number.

1240020423 is a deficient number, since it is larger than the sum of its proper divisors (551860785).

1240020423 is a wasteful number, since it uses less digits than its factorization.

1240020423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56974 (or 56971 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 1240020423 is about 35213.9237092375. The cubic root of 1240020423 is about 1074.3429691249.

Adding to 1240020423 its reverse (3240200421), we get a palindrome (4480220844).

It can be divided in two parts, 12400 and 20423, that added together give a palindrome (32823).

The spelling of 1240020423 in words is "one billion, two hundred forty million, twenty thousand, four hundred twenty-three".