1240424231 has 2 divisors, whose sum is σ = 1240424232. Its totient is φ = 1240424230.

The previous prime is 1240424219. The next prime is 1240424233. The reversal of 1240424231 is 1324240421.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1240424231 is a prime.

It is a super-2 number, since 2×1240424231² = 3077304545703882722, which contains 22 as substring.

Together with 1240424233, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1240424197 and 1240424206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1240424233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620212115 + 620212116.

It is an arithmetic number, because the mean of its divisors is an integer number (620212116).

Almost surely, 2^1240424231 is an apocalyptic number.

1240424231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240424231 is an equidigital number, since it uses as much as digits as its factorization.

1240424231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 1240424231 is about 35219.6568836211. The cubic root of 1240424231 is about 1074.4595750545.

Adding to 1240424231 its reverse (1324240421), we get a palindrome (2564664652).

The spelling of 1240424231 in words is "one billion, two hundred forty million, four hundred twenty-four thousand, two hundred thirty-one".