1243032123 has 4 divisors (see below), whose sum is σ = 1657376168. Its totient is φ = 828688080.

The previous prime is 1243032067. The next prime is 1243032143. The reversal of 1243032123 is 3212303421.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1243032123 - 2⁶ = 1243032059 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1243032123.

It is not an unprimeable number, because it can be changed into a prime (1243032143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 207172018 + ... + 207172023.

It is an arithmetic number, because the mean of its divisors is an integer number (414344042).

Almost surely, 2^1243032123 is an apocalyptic number.

1243032123 is a deficient number, since it is larger than the sum of its proper divisors (414344045).

1243032123 is an equidigital number, since it uses as much as digits as its factorization.

1243032123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414344044.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 1243032123 is about 35256.6606898611. The cubic root of 1243032123 is about 1075.2120361988.

Adding to 1243032123 its reverse (3212303421), we get a palindrome (4455335544).

The spelling of 1243032123 in words is "one billion, two hundred forty-three million, thirty-two thousand, one hundred twenty-three".