1225534867 has 4 divisors (see below), whose sum is σ = 1267794720. Its totient is φ = 1183275016.

The previous prime is 1225534861. The next prime is 1225534931. The reversal of 1225534867 is 7684355221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7684355221 = 1619 ⋅4746359.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1225534867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1225534861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21129883 + ... + 21129940.

It is an arithmetic number, because the mean of its divisors is an integer number (316948680).

Almost surely, 2^1225534867 is an apocalyptic number.

1225534867 is a deficient number, since it is larger than the sum of its proper divisors (42259853).

1225534867 is an equidigital number, since it uses as much as digits as its factorization.

1225534867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42259852.

The product of its digits is 403200, while the sum is 43.

The square root of 1225534867 is about 35007.6401232645. The cubic root of 1225534867 is about 1070.1431860672.

The spelling of 1225534867 in words is "one billion, two hundred twenty-five million, five hundred thirty-four thousand, eight hundred sixty-seven".