1001145391 has 2 divisors, whose sum is σ = 1001145392. Its totient is φ = 1001145390.

The previous prime is 1001145367. The next prime is 1001145401. The reversal of 1001145391 is 1935411001.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1001145391 - 2⁷ = 1001145263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1001145091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500572695 + 500572696.

It is an arithmetic number, because the mean of its divisors is an integer number (500572696).

Almost surely, 2^1001145391 is an apocalyptic number.

1001145391 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001145391 is an equidigital number, since it uses as much as digits as its factorization.

1001145391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540, while the sum is 25.

The square root of 1001145391 is about 31640.8816406876. The cubic root of 1001145391 is about 1000.3816513237.

Adding to 1001145391 its reverse (1935411001), we get a palindrome (2936556392).

The spelling of 1001145391 in words is "one billion, one million, one hundred forty-five thousand, three hundred ninety-one".