1243041111 has 24 divisors (see below), whose sum is σ = 1938955200. Its totient is φ = 762837696.

The previous prime is 1243041089. The next prime is 1243041113. The reversal of 1243041111 is 1111403421.

1243041111 is a `hidden beast` number, since 1 + 243 + 0 + 411 + 11 = 666.

It is not a de Polignac number, because 1243041111 - 2⁷ = 1243040983 is a prime.

It is a super-2 number, since 2×1243041111² = 3090302407272228642, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243041113) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28465 + ... + 57413.

It is an arithmetic number, because the mean of its divisors is an integer number (80789800).

Almost surely, 2^1243041111 is an apocalyptic number.

1243041111 is a deficient number, since it is larger than the sum of its proper divisors (695914089).

1243041111 is a wasteful number, since it uses less digits than its factorization.

1243041111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29335 (or 29332 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 1243041111 is about 35256.7881549071. The cubic root of 1243041111 is about 1075.2146277066.

Adding to 1243041111 its reverse (1111403421), we get a palindrome (2354444532).

The spelling of 1243041111 in words is "one billion, two hundred forty-three million, forty-one thousand, one hundred eleven".