40425421 has 8 divisors (see below), whose sum is σ = 42508224. Its totient is φ = 38369760.

The previous prime is 40425419. The next prime is 40425431. The reversal of 40425421 is 12452404.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40425421 - 2¹ = 40425419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40425392 and 40425401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40425431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3696 + ... + 9721.

It is an arithmetic number, because the mean of its divisors is an integer number (5313528).

Almost surely, 2^40425421 is an apocalyptic number.

It is an amenable number.

40425421 is a deficient number, since it is larger than the sum of its proper divisors (2082803).

40425421 is a wasteful number, since it uses less digits than its factorization.

40425421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13571.

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 40425421 is about 6358.0988510718. The cubic root of 40425421 is about 343.2033490625.

Adding to 40425421 its reverse (12452404), we get a palindrome (52877825).

The spelling of 40425421 in words is "forty million, four hundred twenty-five thousand, four hundred twenty-one".