1220789854 has 4 divisors (see below), whose sum is σ = 1831184784. Its totient is φ = 610394926.

The previous prime is 1220789849. The next prime is 1220789861. The reversal of 1220789854 is 4589870221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4589870221 = 5807 ⋅790403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305197462 + ... + 305197465.

It is an arithmetic number, because the mean of its divisors is an integer number (457796196).

Almost surely, 2^1220789854 is an apocalyptic number.

1220789854 is a deficient number, since it is larger than the sum of its proper divisors (610394930).

1220789854 is an equidigital number, since it uses as much as digits as its factorization.

1220789854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610394929.

The product of its (nonzero) digits is 322560, while the sum is 46.

The square root of 1220789854 is about 34939.8032908029. The cubic root of 1220789854 is about 1068.7602767089.

The spelling of 1220789854 in words is "one billion, two hundred twenty million, seven hundred eighty-nine thousand, eight hundred fifty-four".