1256546225 has 12 divisors (see below), whose sum is σ = 1699764720. Its totient is φ = 913851600.

The previous prime is 1256546167. The next prime is 1256546257. The reversal of 1256546225 is 5226456521.

It is a happy number.

It is not a de Polignac number, because 1256546225 - 2¹⁶ = 1256480689 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2284355 + ... + 2284904.

It is an arithmetic number, because the mean of its divisors is an integer number (141647060).

Almost surely, 2^1256546225 is an apocalyptic number.

It is an amenable number.

1256546225 is a deficient number, since it is larger than the sum of its proper divisors (443218495).

1256546225 is a wasteful number, since it uses less digits than its factorization.

1256546225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4569280 (or 4569275 counting only the distinct ones).

The product of its digits is 144000, while the sum is 38.

The square root of 1256546225 is about 35447.7957706823. The cubic root of 1256546225 is about 1079.0945271284.

The spelling of 1256546225 in words is "one billion, two hundred fifty-six million, five hundred forty-six thousand, two hundred twenty-five".