403521425 has 6 divisors (see below), whose sum is σ = 500366598. Its totient is φ = 322817120.

The previous prime is 403521413. The next prime is 403521427. The reversal of 403521425 is 524125304.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 33856 + 403487569 = 184^2 + 20087^2 .

It is not a de Polignac number, because 403521425 - 2⁴ = 403521409 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 403521394 and 403521403.

It is not an unprimeable number, because it can be changed into a prime (403521427) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8070404 + ... + 8070453.

It is an arithmetic number, because the mean of its divisors is an integer number (83394433).

Almost surely, 2^403521425 is an apocalyptic number.

It is an amenable number.

403521425 is a deficient number, since it is larger than the sum of its proper divisors (96845173).

403521425 is a wasteful number, since it uses less digits than its factorization.

403521425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16140867 (or 16140862 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 403521425 is about 20087.8427164293. The cubic root of 403521425 is about 738.9621590731.

Adding to 403521425 its reverse (524125304), we get a palindrome (927646729).

The spelling of 403521425 in words is "four hundred three million, five hundred twenty-one thousand, four hundred twenty-five".