402425 has 6 divisors (see below), whose sum is σ = 499038. Its totient is φ = 321920.

The previous prime is 402419. The next prime is 402443. The reversal of 402425 is 524204.

It can be written as a sum of positive squares in 3 ways, for example, as 32761 + 369664 = 181^2 + 608^2 .

It is not a de Polignac number, because 402425 - 2⁶ = 402361 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 402425.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8024 + ... + 8073.

It is an arithmetic number, because the mean of its divisors is an integer number (83173).

2⁴⁰²⁴²⁵ is an apocalyptic number.

It is an amenable number.

402425 is a deficient number, since it is larger than the sum of its proper divisors (96613).

402425 is a wasteful number, since it uses less digits than its factorization.

402425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16107 (or 16102 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 17.

The square root of 402425 is about 634.3697659883. The cubic root of 402425 is about 73.8292263607.

Adding to 402425 its reverse (524204), we get a palindrome (926629).

The spelling of 402425 in words is "four hundred two thousand, four hundred twenty-five".