424068021 has 32 divisors (see below), whose sum is σ = 692334720. Its totient is φ = 254886912.

The previous prime is 424068017. The next prime is 424068037. The reversal of 424068021 is 120860424.

It is not a de Polignac number, because 424068021 - 2² = 424068017 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (424068521) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1045 + ... + 29141.

It is an arithmetic number, because the mean of its divisors is an integer number (21635460).

Almost surely, 2^424068021 is an apocalyptic number.

It is an amenable number.

424068021 is a deficient number, since it is larger than the sum of its proper divisors (268266699).

424068021 is a wasteful number, since it uses less digits than its factorization.

424068021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28162 (or 28156 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 424068021 is about 20592.9119116263. The cubic root of 424068021 is about 751.2973226447.

The spelling of 424068021 in words is "four hundred twenty-four million, sixty-eight thousand, twenty-one".