1256010225 has 24 divisors (see below), whose sum is σ = 2087387232. Its totient is φ = 666393600.

The previous prime is 1256010221. The next prime is 1256010253. The reversal of 1256010225 is 5220106521.

It is a happy number.

It is not a de Polignac number, because 1256010225 - 2² = 1256010221 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1256010195 and 1256010204.

It is not an unprimeable number, because it can be changed into a prime (1256010221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28911 + ... + 57860.

It is an arithmetic number, because the mean of its divisors is an integer number (86974468).

Almost surely, 2^1256010225 is an apocalyptic number.

1256010225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1256010225 is a deficient number, since it is larger than the sum of its proper divisors (831377007).

1256010225 is a wasteful number, since it uses less digits than its factorization.

1256010225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86977 (or 86972 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 1256010225 is about 35440.2345505782. The cubic root of 1256010225 is about 1078.9410702650.

Adding to 1256010225 its reverse (5220106521), we get a palindrome (6476116746).

The spelling of 1256010225 in words is "one billion, two hundred fifty-six million, ten thousand, two hundred twenty-five".