424132021 has 4 divisors (see below), whose sum is σ = 426000672. Its totient is φ = 422263372.

The previous prime is 424131977. The next prime is 424132039. The reversal of 424132021 is 120231424.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 424132021 - 2¹¹ = 424129973 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 424132021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (424132321) 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, 933985 + ... + 934438.

It is an arithmetic number, because the mean of its divisors is an integer number (106500168).

Almost surely, 2^424132021 is an apocalyptic number.

It is an amenable number.

424132021 is a deficient number, since it is larger than the sum of its proper divisors (1868651).

424132021 is a wasteful number, since it uses less digits than its factorization.

424132021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1868650.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 424132021 is about 20594.4657857396. The cubic root of 424132021 is about 751.3351158033.

Adding to 424132021 its reverse (120231424), we get a palindrome (544363445).

The spelling of 424132021 in words is "four hundred twenty-four million, one hundred thirty-two thousand, twenty-one".