1144142021 has 8 divisors (see below), whose sum is σ = 1254624384. Its totient is φ = 1034737920.

The previous prime is 1144141997. The next prime is 1144142033. The reversal of 1144142021 is 1202414411.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1144142021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1144141984 and 1144142002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1144142621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 267341 + ... + 271586.

It is an arithmetic number, because the mean of its divisors is an integer number (156828048).

Almost surely, 2^1144142021 is an apocalyptic number.

1144142021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1144142021 is a deficient number, since it is larger than the sum of its proper divisors (110482363).

1144142021 is a wasteful number, since it uses less digits than its factorization.

1144142021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539131.

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 1144142021 is about 33825.1684548651. The cubic root of 1144142021 is about 1045.9075839003.

Adding to 1144142021 its reverse (1202414411), we get a palindrome (2346556432).

The spelling of 1144142021 in words is "one billion, one hundred forty-four million, one hundred forty-two thousand, twenty-one".