1143643 has 2 divisors, whose sum is σ = 1143644. Its totient is φ = 1143642.

The previous prime is 1143619. The next prime is 1143647. The reversal of 1143643 is 3463411.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1143643 - 2¹³ = 1135451 is a prime.

It is a super-2 number, since 2×1143643² = 2615838622898, which contains 22 as substring.

It is a plaindrome in base 15.

It is not a weakly prime, because it can be changed into another prime (1143647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 571821 + 571822.

It is an arithmetic number, because the mean of its divisors is an integer number (571822).

2^1143643 is an apocalyptic number.

1143643 is a deficient number, since it is larger than the sum of its proper divisors (1).

1143643 is an equidigital number, since it uses as much as digits as its factorization.

1143643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 22.

The square root of 1143643 is about 1069.4124555100. The cubic root of 1143643 is about 104.5755503204.

The spelling of 1143643 in words is "one million, one hundred forty-three thousand, six hundred forty-three".