1243923 has 4 divisors (see below), whose sum is σ = 1658568. Its totient is φ = 829280.

The previous prime is 1243889. The next prime is 1243927. The reversal of 1243923 is 3293421.

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

It is a cyclic number.

It is not a de Polignac number, because 1243923 - 2⁶ = 1243859 is a prime.

It is a D-number.

It is a junction number, because it is equal to n+sod(n) for n = 1243893 and 1243902.

It is not an unprimeable number, because it can be changed into a prime (1243927) 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, 207318 + ... + 207323.

It is an arithmetic number, because the mean of its divisors is an integer number (414642).

2^1243923 is an apocalyptic number.

1243923 is a deficient number, since it is larger than the sum of its proper divisors (414645).

1243923 is an equidigital number, since it uses as much as digits as its factorization.

1243923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414644.

The product of its digits is 1296, while the sum is 24.

The square root of 1243923 is about 1115.3129605631. The cubic root of 1243923 is about 107.5468841825.

It can be divided in two parts, 12 and 43923, that multiplied together give a square (527076 = 726²).

The spelling of 1243923 in words is "one million, two hundred forty-three thousand, nine hundred twenty-three".