1256025201 has 8 divisors (see below), whose sum is σ = 1715546784. Its totient is φ = 816926880.

The previous prime is 1256025181. The next prime is 1256025209. The reversal of 1256025201 is 1025206521.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1256025201 - 2¹⁵ = 1255992433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1256025209) 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 7 ways as a sum of consecutive naturals, for example, 5105671 + ... + 5105916.

It is an arithmetic number, because the mean of its divisors is an integer number (214443348).

Almost surely, 2^1256025201 is an apocalyptic number.

It is an amenable number.

1256025201 is a deficient number, since it is larger than the sum of its proper divisors (459521583).

1256025201 is a wasteful number, since it uses less digits than its factorization.

1256025201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10211631.

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

The square root of 1256025201 is about 35440.4458352318. The cubic root of 1256025201 is about 1078.9453584883.

The spelling of 1256025201 in words is "one billion, two hundred fifty-six million, twenty-five thousand, two hundred one".