421123073 has 16 divisors (see below), whose sum is σ = 489861120. Its totient is φ = 354560976.

The previous prime is 421122979. The next prime is 421123091. The reversal of 421123073 is 370321124.

It is not a de Polignac number, because 421123073 - 2¹² = 421118977 is a prime.

It is a super-2 number, since 2×421123073² = 354689285225926658, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (421123093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 195440 + ... + 197582.

It is an arithmetic number, because the mean of its divisors is an integer number (30616320).

Almost surely, 2^421123073 is an apocalyptic number.

It is an amenable number.

421123073 is a deficient number, since it is larger than the sum of its proper divisors (68738047).

421123073 is a wasteful number, since it uses less digits than its factorization.

421123073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2636.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 421123073 is about 20521.2834150304. The cubic root of 421123073 is about 749.5541486376.

Adding to 421123073 its reverse (370321124), we get a palindrome (791444197).

The spelling of 421123073 in words is "four hundred twenty-one million, one hundred twenty-three thousand, seventy-three".