424021385 has 16 divisors (see below), whose sum is σ = 548674560. Its totient is φ = 313522560.

The previous prime is 424021363. The next prime is 424021387. The reversal of 424021385 is 583120424.

It is a happy number.

It is not a de Polignac number, because 424021385 - 2⁶ = 424021321 is a prime.

It is not an unprimeable number, because it can be changed into a prime (424021387) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50537 + ... + 58326.

It is an arithmetic number, because the mean of its divisors is an integer number (34292160).

Almost surely, 2^424021385 is an apocalyptic number.

It is an amenable number.

424021385 is a deficient number, since it is larger than the sum of its proper divisors (124653175).

424021385 is a wasteful number, since it uses less digits than its factorization.

424021385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108928.

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 424021385 is about 20591.7795491308. The cubic root of 424021385 is about 751.2697808474.

The spelling of 424021385 in words is "four hundred twenty-four million, twenty-one thousand, three hundred eighty-five".