1220748367 has 4 divisors (see below), whose sum is σ = 1221015600. Its totient is φ = 1220481136.

The previous prime is 1220748337. The next prime is 1220748407. The reversal of 1220748367 is 7638470221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7638470221 = 47 ⋅162520643.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220748367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220748337) 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, 126643 + ... + 135940.

It is an arithmetic number, because the mean of its divisors is an integer number (305253900).

Almost surely, 2^1220748367 is an apocalyptic number.

1220748367 is a deficient number, since it is larger than the sum of its proper divisors (267233).

1220748367 is an equidigital number, since it uses as much as digits as its factorization.

1220748367 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267232.

The product of its (nonzero) digits is 112896, while the sum is 40.

The square root of 1220748367 is about 34939.2095932349. The cubic root of 1220748367 is about 1068.7481697494.

The spelling of 1220748367 in words is "one billion, two hundred twenty million, seven hundred forty-eight thousand, three hundred sixty-seven".