2578417 has 2 divisors, whose sum is σ = 2578418. Its totient is φ = 2578416.

The previous prime is 2578403. The next prime is 2578423. The reversal of 2578417 is 7148752.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2383936 + 194481 = 1544^2 + 441^2 .

It is a cyclic number.

It is not a de Polignac number, because 2578417 - 2¹¹ = 2576369 is a prime.

It is not a weakly prime, because it can be changed into another prime (2578117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1289208 + 1289209.

It is an arithmetic number, because the mean of its divisors is an integer number (1289209).

2^2578417 is an apocalyptic number.

It is an amenable number.

2578417 is a deficient number, since it is larger than the sum of its proper divisors (1).

2578417 is an equidigital number, since it uses as much as digits as its factorization.

2578417 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15680, while the sum is 34.

The square root of 2578417 is about 1605.7449984353. The cubic root of 2578417 is about 137.1253403863.

The spelling of 2578417 in words is "two million, five hundred seventy-eight thousand, four hundred seventeen".