423505121 has 4 divisors (see below), whose sum is σ = 456082452. Its totient is φ = 390927792.

The previous prime is 423505091. The next prime is 423505123. The reversal of 423505121 is 121505324.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 153264400 + 270240721 = 12380^2 + 16439^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-423505121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (423505123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16288646 + ... + 16288671.

It is an arithmetic number, because the mean of its divisors is an integer number (114020613).

Almost surely, 2^423505121 is an apocalyptic number.

It is an amenable number.

423505121 is a deficient number, since it is larger than the sum of its proper divisors (32577331).

423505121 is a wasteful number, since it uses less digits than its factorization.

423505121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32577330.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 423505121 is about 20579.2400491369. The cubic root of 423505121 is about 750.9647560918.

The spelling of 423505121 in words is "four hundred twenty-three million, five hundred five thousand, one hundred twenty-one".