8581457 has 2 divisors, whose sum is σ = 8581458. Its totient is φ = 8581456.

The previous prime is 8581429. The next prime is 8581471. The reversal of 8581457 is 7541858.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4879681 + 3701776 = 2209^2 + 1924^2 .

It is a cyclic number.

It is not a de Polignac number, because 8581457 - 2⁸ = 8581201 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8581457.

It is not a weakly prime, because it can be changed into another prime (8583457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4290728 + 4290729.

It is an arithmetic number, because the mean of its divisors is an integer number (4290729).

Almost surely, 2^8581457 is an apocalyptic number.

It is an amenable number.

8581457 is a deficient number, since it is larger than the sum of its proper divisors (1).

8581457 is an equidigital number, since it uses as much as digits as its factorization.

8581457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 44800, while the sum is 38.

The square root of 8581457 is about 2929.4123984171. The cubic root of 8581457 is about 204.7326039756.

The spelling of 8581457 in words is "eight million, five hundred eighty-one thousand, four hundred fifty-seven".