424020425 has 6 divisors (see below), whose sum is σ = 525785358. Its totient is φ = 339216320.

The previous prime is 424020383. The next prime is 424020437. The reversal of 424020425 is 524020424.

It can be written as a sum of positive squares in 3 ways, for example, as 28686736 + 395333689 = 5356^2 + 19883^2 .

It is a de Polignac number, because none of the positive numbers 2^k-424020425 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 424020425.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8480384 + ... + 8480433.

It is an arithmetic number, because the mean of its divisors is an integer number (87630893).

Almost surely, 2^424020425 is an apocalyptic number.

It is an amenable number.

424020425 is a deficient number, since it is larger than the sum of its proper divisors (101764933).

424020425 is a wasteful number, since it uses less digits than its factorization.

424020425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16960827 (or 16960822 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 23.

The square root of 424020425 is about 20591.7562388447. The cubic root of 424020425 is about 751.2692138795.

Adding to 424020425 its reverse (524020424), we get a palindrome (948040849).

Subtracting 424020425 from its reverse (524020424), we obtain a palindrome (99999999).

The spelling of 424020425 in words is "four hundred twenty-four million, twenty thousand, four hundred twenty-five".