1001311247 has 2 divisors, whose sum is σ = 1001311248. Its totient is φ = 1001311246.

The previous prime is 1001311211. The next prime is 1001311277. The reversal of 1001311247 is 7421131001.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1001311247 - 2⁶ = 1001311183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1001311277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500655623 + 500655624.

It is an arithmetic number, because the mean of its divisors is an integer number (500655624).

Almost surely, 2^1001311247 is an apocalyptic number.

1001311247 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001311247 is an equidigital number, since it uses as much as digits as its factorization.

1001311247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 20.

The square root of 1001311247 is about 31643.5024452098. The cubic root of 1001311247 is about 1000.4368914314.

Adding to 1001311247 its reverse (7421131001), we get a palindrome (8422442248).

It can be divided in two parts, 10013 and 11247, that multiplied together give a palindrome (112616211).

The spelling of 1001311247 in words is "one billion, one million, three hundred eleven thousand, two hundred forty-seven".