421475517 has 6 divisors (see below), whose sum is σ = 608797982. Its totient is φ = 280983672.

The previous prime is 421475513. The next prime is 421475521. The reversal of 421475517 is 715574124.

It is an interprime number because it is at equal distance from previous prime (421475513) and next prime (421475521).

It can be written as a sum of positive squares in only one way, i.e., 232440516 + 189035001 = 15246^2 + 13749^2 .

It is not a de Polignac number, because 421475517 - 2² = 421475513 is a prime.

It is a super-2 number, since 2×421475517² = 355283222860834578, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421475513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23415298 + ... + 23415315.

Almost surely, 2^421475517 is an apocalyptic number.

It is an amenable number.

421475517 is a deficient number, since it is larger than the sum of its proper divisors (187322465).

421475517 is a wasteful number, since it uses less digits than its factorization.

421475517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46830619 (or 46830616 counting only the distinct ones).

The product of its digits is 39200, while the sum is 36.

The square root of 421475517 is about 20529.8688987533. The cubic root of 421475517 is about 749.7631945721.

The spelling of 421475517 in words is "four hundred twenty-one million, four hundred seventy-five thousand, five hundred seventeen".