1240244431 has 4 divisors (see below), whose sum is σ = 1244157192. Its totient is φ = 1236331672.

The previous prime is 1240244417. The next prime is 1240244443. The reversal of 1240244431 is 1344420421.

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

It is a cyclic number.

It is not a de Polignac number, because 1240244431 - 2¹⁷ = 1240113359 is a prime.

It is a super-2 number, since 2×1240244431² = 3076412497253027522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1240244396 and 1240244405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240244461) 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, 1955905 + ... + 1956538.

It is an arithmetic number, because the mean of its divisors is an integer number (311039298).

Almost surely, 2^1240244431 is an apocalyptic number.

1240244431 is a deficient number, since it is larger than the sum of its proper divisors (3912761).

1240244431 is an equidigital number, since it uses as much as digits as its factorization.

1240244431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3912760.

The product of its (nonzero) digits is 3072, while the sum is 25.

The square root of 1240244431 is about 35217.1042392756. The cubic root of 1240244431 is about 1074.4076580943.

Adding to 1240244431 its reverse (1344420421), we get a palindrome (2584664852).

The spelling of 1240244431 in words is "one billion, two hundred forty million, two hundred forty-four thousand, four hundred thirty-one".