1256801467 has 4 divisors (see below), whose sum is σ = 1256872896. Its totient is φ = 1256730040.

The previous prime is 1256801461. The next prime is 1256801471. The reversal of 1256801467 is 7641086521.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1256801467 - 2²⁷ = 1122583739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1256801461) 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, 11373 + ... + 51409.

It is an arithmetic number, because the mean of its divisors is an integer number (314218224).

Almost surely, 2^1256801467 is an apocalyptic number.

1256801467 is a deficient number, since it is larger than the sum of its proper divisors (71429).

1256801467 is an equidigital number, since it uses as much as digits as its factorization.

1256801467 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71428.

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 1256801467 is about 35451.3958399384. The cubic root of 1256801467 is about 1079.1675876049.

Adding to 1256801467 its reverse (7641086521), we get a palindrome (8897887988).

The spelling of 1256801467 in words is "one billion, two hundred fifty-six million, eight hundred one thousand, four hundred sixty-seven".