423129521 has 8 divisors (see below), whose sum is σ = 436756800. Its totient is φ = 409617648.

The previous prime is 423129493. The next prime is 423129529. The reversal of 423129521 is 125921324.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 423129521 - 2¹⁸ = 422867377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (423129529) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21371 + ... + 36096.

It is an arithmetic number, because the mean of its divisors is an integer number (54594600).

Almost surely, 2^423129521 is an apocalyptic number.

It is an amenable number.

423129521 is a deficient number, since it is larger than the sum of its proper divisors (13627279).

423129521 is a wasteful number, since it uses less digits than its factorization.

423129521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57703.

The product of its digits is 4320, while the sum is 29.

The square root of 423129521 is about 20570.1123234658. The cubic root of 423129521 is about 750.7426841694.

The spelling of 423129521 in words is "four hundred twenty-three million, one hundred twenty-nine thousand, five hundred twenty-one".