7042121 has 2 divisors, whose sum is σ = 7042122. Its totient is φ = 7042120.

The previous prime is 7042093. The next prime is 7042129. The reversal of 7042121 is 1212407.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3841600 + 3200521 = 1960^2 + 1789^2 .

It is a cyclic number.

It is not a de Polignac number, because 7042121 - 2¹⁴ = 7025737 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is an Ulam number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 7042121.

It is not a weakly prime, because it can be changed into another prime (7042129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3521060 + 3521061.

It is an arithmetic number, because the mean of its divisors is an integer number (3521061).

Almost surely, 2^7042121 is an apocalyptic number.

It is an amenable number.

7042121 is a deficient number, since it is larger than the sum of its proper divisors (1).

7042121 is an equidigital number, since it uses as much as digits as its factorization.

7042121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 7042121 is about 2653.6994931604. The cubic root of 7042121 is about 191.6760397013.

Adding to 7042121 its reverse (1212407), we get a palindrome (8254528).

The spelling of 7042121 in words is "seven million, forty-two thousand, one hundred twenty-one".