1240412347 has 2 divisors, whose sum is σ = 1240412348. Its totient is φ = 1240412346.

The previous prime is 1240412311. The next prime is 1240412353. The reversal of 1240412347 is 7432140421.

It is a strong prime.

It is an emirp because it is prime and its reverse (7432140421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1240412347 - 2¹⁵ = 1240379579 is a prime.

It is not a weakly prime, because it can be changed into another prime (1240412377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620206173 + 620206174.

It is an arithmetic number, because the mean of its divisors is an integer number (620206174).

Almost surely, 2^1240412347 is an apocalyptic number.

1240412347 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240412347 is an equidigital number, since it uses as much as digits as its factorization.

1240412347 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 1240412347 is about 35219.4881706137. The cubic root of 1240412347 is about 1074.4561437235.

Adding to 1240412347 its reverse (7432140421), we get a palindrome (8672552768).

The spelling of 1240412347 in words is "one billion, two hundred forty million, four hundred twelve thousand, three hundred forty-seven".