17420401 has 2 divisors, whose sum is σ = 17420402. Its totient is φ = 17420400.

The previous prime is 17420363. The next prime is 17420423. The reversal of 17420401 is 10402471.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10556001 + 6864400 = 3249^2 + 2620^2 .

It is an emirp because it is prime and its reverse (10402471) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 17420401 - 2¹⁷ = 17289329 is a prime.

It is not a weakly prime, because it can be changed into another prime (17427401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8710200 + 8710201.

It is an arithmetic number, because the mean of its divisors is an integer number (8710201).

Almost surely, 2^17420401 is an apocalyptic number.

It is an amenable number.

17420401 is a deficient number, since it is larger than the sum of its proper divisors (1).

17420401 is an equidigital number, since it uses as much as digits as its factorization.

17420401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 17420401 is about 4173.7753892609. The cubic root of 17420401 is about 259.2304712008.

Adding to 17420401 its reverse (10402471), we get a palindrome (27822872).

The spelling of 17420401 in words is "seventeen million, four hundred twenty thousand, four hundred one".