421750406 has 16 divisors (see below), whose sum is σ = 788728320. Its totient is φ = 164318280.

The previous prime is 421750403. The next prime is 421750409. The reversal of 421750406 is 604057124.

It is an interprime number because it is at equal distance from previous prime (421750403) and next prime (421750409).

It is a super-2 number, since 2×421750406² = 355746809922329672, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421750403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1369166 + ... + 1369473.

It is an arithmetic number, because the mean of its divisors is an integer number (49295520).

Almost surely, 2^421750406 is an apocalyptic number.

421750406 is a deficient number, since it is larger than the sum of its proper divisors (366977914).

421750406 is a wasteful number, since it uses less digits than its factorization.

421750406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2738659.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 421750406 is about 20536.5626627243. The cubic root of 421750406 is about 749.9261592488.

The spelling of 421750406 in words is "four hundred twenty-one million, seven hundred fifty thousand, four hundred six".