421342161 has 16 divisors (see below), whose sum is σ = 595974528. Its totient is φ = 263865600.

The previous prime is 421342153. The next prime is 421342171. The reversal of 421342161 is 161243124.

It is not a de Polignac number, because 421342161 - 2³ = 421342153 is a prime.

It is a super-2 number, since 2×421342161² = 355058433272299842, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (421342171) 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, 19956 + ... + 35226.

It is an arithmetic number, because the mean of its divisors is an integer number (37248408).

Almost surely, 2^421342161 is an apocalyptic number.

It is an amenable number.

421342161 is a deficient number, since it is larger than the sum of its proper divisors (174632367).

421342161 is a wasteful number, since it uses less digits than its factorization.

421342161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15832.

The product of its digits is 1152, while the sum is 24.

The square root of 421342161 is about 20526.6207886247. The cubic root of 421342161 is about 749.6841105260.

Adding to 421342161 its reverse (161243124), we get a palindrome (582585285).

The spelling of 421342161 in words is "four hundred twenty-one million, three hundred forty-two thousand, one hundred sixty-one".