1002402425 has 6 divisors (see below), whose sum is σ = 1242979038. Its totient is φ = 801921920.

The previous prime is 1002402421. The next prime is 1002402431. The reversal of 1002402425 is 5242042001.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 19642624 + 982759801 = 4432^2 + 31349^2 .

It is not a de Polignac number, because 1002402425 - 2² = 1002402421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1002402397 and 1002402406.

It is not an unprimeable number, because it can be changed into a prime (1002402421) 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, 20048024 + ... + 20048073.

It is an arithmetic number, because the mean of its divisors is an integer number (207163173).

Almost surely, 2^1002402425 is an apocalyptic number.

It is an amenable number.

1002402425 is a deficient number, since it is larger than the sum of its proper divisors (240576613).

1002402425 is an equidigital number, since it uses as much as digits as its factorization.

1002402425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40096107 (or 40096102 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 1002402425 is about 31660.7394891528. The cubic root of 1002402425 is about 1000.8001678939.

Adding to 1002402425 its reverse (5242042001), we get a palindrome (6244444426).

The spelling of 1002402425 in words is "one billion, two million, four hundred two thousand, four hundred twenty-five".