1240254427 has 4 divisors (see below), whose sum is σ = 1254189960. Its totient is φ = 1226318896.

The previous prime is 1240254403. The next prime is 1240254437. The reversal of 1240254427 is 7244520421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7244520421 = 29 ⋅249811049.

It is not a de Polignac number, because 1240254427 - 2⁷ = 1240254299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1240254437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6967633 + ... + 6967810.

It is an arithmetic number, because the mean of its divisors is an integer number (313547490).

Almost surely, 2^1240254427 is an apocalyptic number.

1240254427 is a deficient number, since it is larger than the sum of its proper divisors (13935533).

1240254427 is an equidigital number, since it uses as much as digits as its factorization.

1240254427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13935532.

The product of its (nonzero) digits is 17920, while the sum is 31.

The square root of 1240254427 is about 35217.2461586649. The cubic root of 1240254427 is about 1074.4105445549.

Adding to 1240254427 its reverse (7244520421), we get a palindrome (8484774848).

The spelling of 1240254427 in words is "one billion, two hundred forty million, two hundred fifty-four thousand, four hundred twenty-seven".