1242023 has 4 divisors (see below), whose sum is σ = 1296048. Its totient is φ = 1188000.

The previous prime is 1242001. The next prime is 1242029. The reversal of 1242023 is 3202421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3202421 = 139 ⋅23039.

It is a cyclic number.

It is not a de Polignac number, because 1242023 - 2¹⁰ = 1240999 is a prime.

It is a super-2 number, since 2×1242023² = 3085242265058, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 1241989 and 1242007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26978 + ... + 27023.

It is an arithmetic number, because the mean of its divisors is an integer number (324012).

2^1242023 is an apocalyptic number.

1242023 is a deficient number, since it is larger than the sum of its proper divisors (54025).

1242023 is an equidigital number, since it uses as much as digits as its factorization.

1242023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54024.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 1242023 is about 1114.4608561991. The cubic root of 1242023 is about 107.4920996538.

Adding to 1242023 its reverse (3202421), we get a palindrome (4444444).

The spelling of 1242023 in words is "one million, two hundred forty-two thousand, twenty-three".