1920229 has 6 divisors (see below), whose sum is σ = 1949766. Its totient is φ = 1891080.

The previous prime is 1920227. The next prime is 1920239. The reversal of 1920229 is 9220291.

It can be written as a sum of positive squares in only one way, i.e., 1060900 + 859329 = 1030^2 + 927^2 .

It is not a de Polignac number, because 1920229 - 2¹ = 1920227 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 (1920221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10519 + ... + 10699.

It is an arithmetic number, because the mean of its divisors is an integer number (324961).

2^1920229 is an apocalyptic number.

It is an amenable number.

1920229 is a deficient number, since it is larger than the sum of its proper divisors (29537).

1920229 is an equidigital number, since it uses as much as digits as its factorization.

1920229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387 (or 284 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 1920229 is about 1385.7232768486. The cubic root of 1920229 is about 124.2942414045.

The spelling of 1920229 in words is "one million, nine hundred twenty thousand, two hundred twenty-nine".