1220426554 has 4 divisors (see below), whose sum is σ = 1830639834. Its totient is φ = 610213276.

The previous prime is 1220426539. The next prime is 1220426579. The reversal of 1220426554 is 4556240221.

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

It can be written as a sum of positive squares in only one way, i.e., 1030731025 + 189695529 = 32105^2 + 13773^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 305106637 + ... + 305106640.

Almost surely, 2^1220426554 is an apocalyptic number.

1220426554 is a deficient number, since it is larger than the sum of its proper divisors (610213280).

1220426554 is an equidigital number, since it uses as much as digits as its factorization.

1220426554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610213279.

The product of its (nonzero) digits is 19200, while the sum is 31.

The square root of 1220426554 is about 34934.6039622607. The cubic root of 1220426554 is about 1068.6542472312.

Adding to 1220426554 its reverse (4556240221), we get a palindrome (5776666775).

The spelling of 1220426554 in words is "one billion, two hundred twenty million, four hundred twenty-six thousand, five hundred fifty-four".