1029221154 has 84 divisors (see below), whose sum is σ = 2507038146. Its totient is φ = 316607616.

The previous prime is 1029221153. The next prime is 1029221159. The reversal of 1029221154 is 4511229201.

1029221154 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 765905625 + 263315529 = 27675^2 + 16227^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1029221153) by changing a digit.

It is a polite number, since it can be written in 41 ways as a sum of consecutive naturals, for example, 244314 + ... + 248490.

Almost surely, 2^1029221154 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1029221154, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1253519073).

1029221154 is an abundant number, since it is smaller than the sum of its proper divisors (1477816992).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1029221154 is an equidigital number, since it uses as much as digits as its factorization.

1029221154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4223 (or 4195 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 1029221154 is about 32081.4768051597. The cubic root of 1029221154 is about 1009.6470203975.

The spelling of 1029221154 in words is "one billion, twenty-nine million, two hundred twenty-one thousand, one hundred fifty-four".