1143954421 has 2 divisors, whose sum is σ = 1143954422. Its totient is φ = 1143954420.

The previous prime is 1143954353. The next prime is 1143954433. The reversal of 1143954421 is 1244593411.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 943165521 + 200788900 = 30711^2 + 14170^2 .

It is a cyclic number.

It is not a de Polignac number, because 1143954421 - 2¹³ = 1143946229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1143954121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 571977210 + 571977211.

It is an arithmetic number, because the mean of its divisors is an integer number (571977211).

Almost surely, 2^1143954421 is an apocalyptic number.

It is an amenable number.

1143954421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1143954421 is an equidigital number, since it uses as much as digits as its factorization.

1143954421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 34.

The square root of 1143954421 is about 33822.3952581718. The cubic root of 1143954421 is about 1045.8504164671.

The spelling of 1143954421 in words is "one billion, one hundred forty-three million, nine hundred fifty-four thousand, four hundred twenty-one".