423742121 has 6 divisors (see below), whose sum is σ = 465766266. Its totient is φ = 385220000.

The previous prime is 423742097. The next prime is 423742127. The reversal of 423742121 is 121247324.

It can be written as a sum of positive squares in only one way, i.e., 368448025 + 55294096 = 19195^2 + 7436^2 .

It is not a de Polignac number, because 423742121 - 2⁶ = 423742057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (423742127) 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 5 ways as a sum of consecutive naturals, for example, 1750880 + ... + 1751121.

It is an arithmetic number, because the mean of its divisors is an integer number (77627711).

Almost surely, 2^423742121 is an apocalyptic number.

It is an amenable number.

423742121 is a deficient number, since it is larger than the sum of its proper divisors (42024145).

423742121 is a wasteful number, since it uses less digits than its factorization.

423742121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3502023 (or 3502012 counting only the distinct ones).

The product of its digits is 2688, while the sum is 26.

The square root of 423742121 is about 20584.9974738886. The cubic root of 423742121 is about 751.1048137903.

Adding to 423742121 its reverse (121247324), we get a palindrome (544989445).

The spelling of 423742121 in words is "four hundred twenty-three million, seven hundred forty-two thousand, one hundred twenty-one".