1201256867 has 4 divisors (see below), whose sum is σ = 1201416480. Its totient is φ = 1201097256.

The previous prime is 1201256863. The next prime is 1201256887. The reversal of 1201256867 is 7686521021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1201256867 - 2² = 1201256863 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1201256867.

It is not an unprimeable number, because it can be changed into a prime (1201256863) 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 3 ways as a sum of consecutive naturals, for example, 67928 + ... + 83765.

It is an arithmetic number, because the mean of its divisors is an integer number (300354120).

Almost surely, 2^1201256867 is an apocalyptic number.

1201256867 is a deficient number, since it is larger than the sum of its proper divisors (159613).

1201256867 is an equidigital number, since it uses as much as digits as its factorization.

1201256867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159612.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 1201256867 is about 34659.1527161297. The cubic root of 1201256867 is about 1063.0294454199.

Adding to 1201256867 its reverse (7686521021), we get a palindrome (8887777888).

The spelling of 1201256867 in words is "one billion, two hundred one million, two hundred fifty-six thousand, eight hundred sixty-seven".