406235421 has 12 divisors (see below), whose sum is σ = 601096860. Its totient is φ = 264217920.

The previous prime is 406235381. The next prime is 406235441. The reversal of 406235421 is 124532604.

406235421 is a `hidden beast` number, since 4 + 0 + 6 + 235 + 421 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 27154521 + 379080900 = 5211^2 + 19470^2 .

It is not a de Polignac number, because 406235421 - 2¹³ = 406227229 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406235441) 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, 550086 + ... + 550823.

It is an arithmetic number, because the mean of its divisors is an integer number (50091405).

Almost surely, 2^406235421 is an apocalyptic number.

406235421 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

406235421 is a deficient number, since it is larger than the sum of its proper divisors (194861439).

406235421 is a wasteful number, since it uses less digits than its factorization.

406235421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1100956 (or 1100953 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 406235421 is about 20155.2827070225. The cubic root of 406235421 is about 740.6151574615.

The spelling of 406235421 in words is "four hundred six million, two hundred thirty-five thousand, four hundred twenty-one".