1220454154 has 12 divisors (see below), whose sum is σ = 1895987574. Its totient is φ = 589183952.

The previous prime is 1220454149. The next prime is 1220454163. The reversal of 1220454154 is 4514540221.

It can be written as a sum of positive squares in 3 ways, for example, as 1130640625 + 89813529 = 33625^2 + 9477^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 361117 + ... + 364480.

Almost surely, 2^1220454154 is an apocalyptic number.

1220454154 is a deficient number, since it is larger than the sum of its proper divisors (675533420).

1220454154 is an equidigital number, since it uses as much as digits as its factorization.

1220454154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 725657 (or 725628 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 28.

The square root of 1220454154 is about 34934.9989838271. The cubic root of 1220454154 is about 1068.6623030580.

Adding to 1220454154 its reverse (4514540221), we get a palindrome (5734994375).

The spelling of 1220454154 in words is "one billion, two hundred twenty million, four hundred fifty-four thousand, one hundred fifty-four".