4012423521 has 8 divisors (see below), whose sum is σ = 5664597984. Its totient is φ = 2517599040.

The previous prime is 4012423507. The next prime is 4012423529. The reversal of 4012423521 is 1253242104.

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

It is not a de Polignac number, because 4012423521 - 2¹¹ = 4012421473 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4012423491 and 4012423500.

It is not an unprimeable number, because it can be changed into a prime (4012423529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39337435 + ... + 39337536.

It is an arithmetic number, because the mean of its divisors is an integer number (708074748).

Almost surely, 2^4012423521 is an apocalyptic number.

It is an amenable number.

4012423521 is a deficient number, since it is larger than the sum of its proper divisors (1652174463).

4012423521 is a wasteful number, since it uses less digits than its factorization.

4012423521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78674991.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 4012423521 is about 63343.6936166498. The cubic root of 4012423521 is about 1589.0427793287.

Adding to 4012423521 its reverse (1253242104), we get a palindrome (5265665625).

The spelling of 4012423521 in words is "four billion, twelve million, four hundred twenty-three thousand, five hundred twenty-one".