416220421 has 2 divisors, whose sum is σ = 416220422. Its totient is φ = 416220420.

The previous prime is 416220407. The next prime is 416220433. The reversal of 416220421 is 124022614.

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., 359519521 + 56700900 = 18961^2 + 7530^2 .

It is a cyclic number.

It is not a de Polignac number, because 416220421 - 2¹⁹ = 415696133 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 416220392 and 416220401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (416220461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 208110210 + 208110211.

It is an arithmetic number, because the mean of its divisors is an integer number (208110211).

Almost surely, 2^416220421 is an apocalyptic number.

It is an amenable number.

416220421 is a deficient number, since it is larger than the sum of its proper divisors (1).

416220421 is an equidigital number, since it uses as much as digits as its factorization.

416220421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 416220421 is about 20401.4808531146. The cubic root of 416220421 is about 746.6340548531.

The spelling of 416220421 in words is "four hundred sixteen million, two hundred twenty thousand, four hundred twenty-one".