4240425 has 48 divisors (see below), whose sum is σ = 8249472. Its totient is φ = 1881600.

The previous prime is 4240421. The next prime is 4240433. The reversal of 4240425 is 5240424.

It is not a de Polignac number, because 4240425 - 2² = 4240421 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4240421) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 21427 + ... + 21623.

It is an arithmetic number, because the mean of its divisors is an integer number (171864).

Almost surely, 2^4240425 is an apocalyptic number.

It is an amenable number.

4240425 is a deficient number, since it is larger than the sum of its proper divisors (4009047).

4240425 is a wasteful number, since it uses less digits than its factorization.

4240425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258 (or 253 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 21.

The square root of 4240425 is about 2059.2292247343. The cubic root of 4240425 is about 161.8588543499.

Adding to 4240425 its reverse (5240424), we get a palindrome (9480849).

Subtracting 4240425 from its reverse (5240424), we obtain a palindrome (999999).

The spelling of 4240425 in words is "four million, two hundred forty thousand, four hundred twenty-five".