7042123 has 4 divisors (see below), whose sum is σ = 7682328. Its totient is φ = 6401920.

The previous prime is 7042121. The next prime is 7042129. The reversal of 7042123 is 3212407.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3212407 = 11 ⋅292037.

It is a cyclic number.

It is not a de Polignac number, because 7042123 - 2¹ = 7042121 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 7042123.

It is not an unprimeable number, because it can be changed into a prime (7042121) 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, 320086 + ... + 320107.

It is an arithmetic number, because the mean of its divisors is an integer number (1920582).

Almost surely, 2^7042123 is an apocalyptic number.

7042123 is a deficient number, since it is larger than the sum of its proper divisors (640205).

7042123 is a wasteful number, since it uses less digits than its factorization.

7042123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640204.

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 7042123 is about 2653.6998699928. The cubic root of 7042123 is about 191.6760578469.

The spelling of 7042123 in words is "seven million, forty-two thousand, one hundred twenty-three".