1047072581 has 2 divisors, whose sum is σ = 1047072582. Its totient is φ = 1047072580.

The previous prime is 1047072569. The next prime is 1047072589. The reversal of 1047072581 is 1852707401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 535181956 + 511890625 = 23134^2 + 22625^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1047072581 is a prime.

It is a super-2 number, since 2×1047072581² = 2192721979764003122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1047072589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 523536290 + 523536291.

It is an arithmetic number, because the mean of its divisors is an integer number (523536291).

Almost surely, 2^1047072581 is an apocalyptic number.

It is an amenable number.

1047072581 is a deficient number, since it is larger than the sum of its proper divisors (1).

1047072581 is an equidigital number, since it uses as much as digits as its factorization.

1047072581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15680, while the sum is 35.

The square root of 1047072581 is about 32358.5009077986. The cubic root of 1047072581 is about 1015.4509004750.

Adding to 1047072581 its reverse (1852707401), we get a palindrome (2899779982).

The spelling of 1047072581 in words is "one billion, forty-seven million, seventy-two thousand, five hundred eighty-one".