1144139285 has 8 divisors (see below), whose sum is σ = 1377820320. Its totient is φ = 912075984.

The previous prime is 1144139279. The next prime is 1144139299. The reversal of 1144139285 is 5829314411.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1144139285 - 2¹² = 1144135189 is a prime.

It is a super-2 number, since 2×1144139285² = 2618109406960622450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 402875 + ... + 405704.

It is an arithmetic number, because the mean of its divisors is an integer number (172227540).

Almost surely, 2^1144139285 is an apocalyptic number.

It is an amenable number.

1144139285 is a deficient number, since it is larger than the sum of its proper divisors (233681035).

1144139285 is an equidigital number, since it uses as much as digits as its factorization.

1144139285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 808867.

The product of its digits is 34560, while the sum is 38.

The square root of 1144139285 is about 33825.1280115833. The cubic root of 1144139285 is about 1045.9067502027.

The spelling of 1144139285 in words is "one billion, one hundred forty-four million, one hundred thirty-nine thousand, two hundred eighty-five".