421066161 has 16 divisors (see below), whose sum is σ = 624120000. Its totient is φ = 280567584.

The previous prime is 421066153. The next prime is 421066169. The reversal of 421066161 is 161660124.

421066161 is a `hidden beast` number, since 42 + 1 + 0 + 6 + 616 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (421066153) and next prime (421066169).

It is not a de Polignac number, because 421066161 - 2³ = 421066153 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (421066169) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92245 + ... + 96701.

It is an arithmetic number, because the mean of its divisors is an integer number (39007500).

Almost surely, 2^421066161 is an apocalyptic number.

It is an amenable number.

421066161 is a deficient number, since it is larger than the sum of its proper divisors (203053839).

421066161 is a wasteful number, since it uses less digits than its factorization.

421066161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7965 (or 7959 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 421066161 is about 20519.8967102664. The cubic root of 421066161 is about 749.5203813533.

The spelling of 421066161 in words is "four hundred twenty-one million, sixty-six thousand, one hundred sixty-one".