416666421 has 12 divisors (see below), whose sum is σ = 614657472. Its totient is φ = 271867176.

The previous prime is 416666401. The next prime is 416666423. The reversal of 416666421 is 124666614.

It is not a de Polignac number, because 416666421 - 2⁵ = 416666389 is a prime.

It is a super-2 number, since 2×416666421² = 347221812777898482, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (416666423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 492091 + ... + 492936.

It is an arithmetic number, because the mean of its divisors is an integer number (51221456).

Almost surely, 2^416666421 is an apocalyptic number.

It is an amenable number.

416666421 is a deficient number, since it is larger than the sum of its proper divisors (197991051).

416666421 is a wasteful number, since it uses less digits than its factorization.

416666421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 985080 (or 985077 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 416666421 is about 20412.4085056125. The cubic root of 416666421 is about 746.9006443019.

The spelling of 416666421 in words is "four hundred sixteen million, six hundred sixty-six thousand, four hundred twenty-one".