420875417 has 4 divisors (see below), whose sum is σ = 427775076. Its totient is φ = 413975760.

The previous prime is 420875387. The next prime is 420875419. The reversal of 420875417 is 714578024.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 238733401 + 182142016 = 15451^2 + 13496^2 .

It is a cyclic number.

It is not a de Polignac number, because 420875417 - 2⁶ = 420875353 is a prime.

It is a super-2 number, since 2×420875417² = 354272233269847778, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420875419) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3449738 + ... + 3449859.

It is an arithmetic number, because the mean of its divisors is an integer number (106943769).

Almost surely, 2^420875417 is an apocalyptic number.

It is an amenable number.

420875417 is a deficient number, since it is larger than the sum of its proper divisors (6899659).

420875417 is an equidigital number, since it uses as much as digits as its factorization.

420875417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6899658.

The product of its (nonzero) digits is 62720, while the sum is 38.

The square root of 420875417 is about 20515.2484021033. The cubic root of 420875417 is about 749.4071860708.

The spelling of 420875417 in words is "four hundred twenty million, eight hundred seventy-five thousand, four hundred seventeen".