1256101441 has 4 divisors (see below), whose sum is σ = 1435544512. Its totient is φ = 1076658372.

The previous prime is 1256101421. The next prime is 1256101459. The reversal of 1256101441 is 1441016521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1441016521 = 7 ⋅205859503.

It is a cyclic number.

It is not a de Polignac number, because 1256101441 - 2⁷ = 1256101313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1256101421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89721525 + ... + 89721538.

It is an arithmetic number, because the mean of its divisors is an integer number (358886128).

Almost surely, 2^1256101441 is an apocalyptic number.

It is an amenable number.

1256101441 is a deficient number, since it is larger than the sum of its proper divisors (179443071).

1256101441 is an equidigital number, since it uses as much as digits as its factorization.

1256101441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179443070.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 1256101441 is about 35441.5214261465. The cubic root of 1256101441 is about 1078.9671884988.

Adding to 1256101441 its reverse (1441016521), we get a palindrome (2697117962).

The spelling of 1256101441 in words is "one billion, two hundred fifty-six million, one hundred one thousand, four hundred forty-one".