1001214581 has 2 divisors, whose sum is σ = 1001214582. Its totient is φ = 1001214580.

The previous prime is 1001214509. The next prime is 1001214583. The reversal of 1001214581 is 1854121001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 995970481 + 5244100 = 31559^2 + 2290^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1001214581 is a prime.

It is a super-2 number, since 2×1001214581² = 2004861274414011122, which contains 22 as substring.

Together with 1001214583, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1001214583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500607290 + 500607291.

It is an arithmetic number, because the mean of its divisors is an integer number (500607291).

Almost surely, 2^1001214581 is an apocalyptic number.

It is an amenable number.

1001214581 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001214581 is an equidigital number, since it uses as much as digits as its factorization.

1001214581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 320, while the sum is 23.

The square root of 1001214581 is about 31641.9749857685. The cubic root of 1001214581 is about 1000.4046965320.

Adding to 1001214581 its reverse (1854121001), we get a palindrome (2855335582).

The spelling of 1001214581 in words is "one billion, one million, two hundred fourteen thousand, five hundred eighty-one".