7042257 has 6 divisors (see below), whose sum is σ = 10172162. Its totient is φ = 4694832.

The previous prime is 7042253. The next prime is 7042271. The reversal of 7042257 is 7522407.

It can be written as a sum of positive squares in only one way, i.e., 6395841 + 646416 = 2529^2 + 804^2 .

It is not a de Polignac number, because 7042257 - 2² = 7042253 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 7042257.

It is not an unprimeable number, because it can be changed into a prime (7042253) 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 5 ways as a sum of consecutive naturals, for example, 391228 + ... + 391245.

Almost surely, 2^7042257 is an apocalyptic number.

It is an amenable number.

7042257 is a deficient number, since it is larger than the sum of its proper divisors (3129905).

7042257 is a wasteful number, since it uses less digits than its factorization.

7042257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 782479 (or 782476 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 27.

The square root of 7042257 is about 2653.7251176412. The cubic root of 7042257 is about 191.6772735991.

The spelling of 7042257 in words is "seven million, forty-two thousand, two hundred fifty-seven".