1242400425 has 24 divisors (see below), whose sum is σ = 2347546176. Its totient is φ = 567954240.

The previous prime is 1242400391. The next prime is 1242400447. The reversal of 1242400425 is 5240042421.

It is a happy number.

It is not a de Polignac number, because 1242400425 - 2⁷ = 1242400297 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1242400395 and 1242400404.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1182714 + ... + 1183763.

It is an arithmetic number, because the mean of its divisors is an integer number (97814424).

Almost surely, 2^1242400425 is an apocalyptic number.

1242400425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1242400425 is a deficient number, since it is larger than the sum of its proper divisors (1105145751).

1242400425 is a wasteful number, since it uses less digits than its factorization.

1242400425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2366497 (or 2366492 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 24.

The square root of 1242400425 is about 35247.7009888588. The cubic root of 1242400425 is about 1075.0298675675.

Adding to 1242400425 its reverse (5240042421), we get a palindrome (6482442846).

The spelling of 1242400425 in words is "one billion, two hundred forty-two million, four hundred thousand, four hundred twenty-five".