1240420027 has 16 divisors (see below), whose sum is σ = 1584221184. Its totient is φ = 942984000.

The previous prime is 1240420021. The next prime is 1240420033. The reversal of 1240420027 is 7200240421.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1240420021) and next prime (1240420033).

It is a de Polignac number, because none of the positive numbers 2^k-1240420027 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1240420021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 193299 + ... + 199612.

It is an arithmetic number, because the mean of its divisors is an integer number (99013824).

Almost surely, 2^1240420027 is an apocalyptic number.

1240420027 is a deficient number, since it is larger than the sum of its proper divisors (343801157).

1240420027 is a wasteful number, since it uses less digits than its factorization.

1240420027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392970.

The product of its (nonzero) digits is 896, while the sum is 22.

The square root of 1240420027 is about 35219.5972009902. The cubic root of 1240420027 is about 1074.4583612136.

Adding to 1240420027 its reverse (7200240421), we get a palindrome (8440660448).

The spelling of 1240420027 in words is "one billion, two hundred forty million, four hundred twenty thousand, twenty-seven".