402002540425 has 24 divisors (see below), whose sum is σ = 514251696896. Its totient is φ = 311506741440.

The previous prime is 402002540413. The next prime is 402002540431. The reversal of 402002540425 is 524045200204.

It is not a de Polignac number, because 402002540425 - 2¹³ = 402002532233 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 402002540393 and 402002540402.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 768159 + ... + 1180708.

Almost surely, 2^402002540425 is an apocalyptic number.

It is an amenable number.

402002540425 is a deficient number, since it is larger than the sum of its proper divisors (112249156471).

402002540425 is a wasteful number, since it uses less digits than its factorization.

402002540425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1949137 (or 1949132 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 28.

Adding to 402002540425 its reverse (524045200204), we get a palindrome (926047740629).

The spelling of 402002540425 in words is "four hundred two billion, two million, five hundred forty thousand, four hundred twenty-five".