1285440227 has 4 divisors (see below), whose sum is σ = 1361054376. Its totient is φ = 1209826080.

The previous prime is 1285440209. The next prime is 1285440239. The reversal of 1285440227 is 7220445821.

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

It is not a de Polignac number, because 1285440227 - 2⁸ = 1285439971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1285440727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37807049 + ... + 37807082.

It is an arithmetic number, because the mean of its divisors is an integer number (340263594).

Almost surely, 2^1285440227 is an apocalyptic number.

1285440227 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1285440227 is a deficient number, since it is larger than the sum of its proper divisors (75614149).

1285440227 is an equidigital number, since it uses as much as digits as its factorization.

1285440227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75614148.

The product of its (nonzero) digits is 35840, while the sum is 35.

The square root of 1285440227 is about 35853.0365101758. The cubic root of 1285440227 is about 1087.3031066805.

The spelling of 1285440227 in words is "one billion, two hundred eighty-five million, four hundred forty thousand, two hundred twenty-seven".