1143015421 has 8 divisors (see below), whose sum is σ = 1153094744. Its totient is φ = 1132971840.

The previous prime is 1143015407. The next prime is 1143015443. The reversal of 1143015421 is 1245103411.

It can be written as a sum of positive squares in 4 ways, for example, as 143760100 + 999255321 = 11990^2 + 31611^2 .

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 1143015421 - 2⁵ = 1143015389 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1143015392 and 1143015401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143015481) 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, 57451 + ... + 74743.

It is an arithmetic number, because the mean of its divisors is an integer number (144136843).

Almost surely, 2^1143015421 is an apocalyptic number.

It is an amenable number.

1143015421 is a deficient number, since it is larger than the sum of its proper divisors (10079323).

1143015421 is a wasteful number, since it uses less digits than its factorization.

1143015421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17871.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 1143015421 is about 33808.5110733969. The cubic root of 1143015421 is about 1045.5641805974.

Adding to 1143015421 its reverse (1245103411), we get a palindrome (2388118832).

The spelling of 1143015421 in words is "one billion, one hundred forty-three million, fifteen thousand, four hundred twenty-one".