7042561 has 4 divisors (see below), whose sum is σ = 7141824. Its totient is φ = 6943300.

The previous prime is 7042523. The next prime is 7042579. The reversal of 7042561 is 1652407.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7042561 - 2¹¹ = 7040513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7042501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49525 + ... + 49666.

It is an arithmetic number, because the mean of its divisors is an integer number (1785456).

Almost surely, 2^7042561 is an apocalyptic number.

7042561 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

It is an amenable number.

7042561 is a deficient number, since it is larger than the sum of its proper divisors (99263).

7042561 is an equidigital number, since it uses as much as digits as its factorization.

7042561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99262.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 7042561 is about 2653.7823949978. The cubic root of 7042561 is about 191.6800316662.

Adding to 7042561 its reverse (1652407), we get a palindrome (8694968).

The spelling of 7042561 in words is "seven million, forty-two thousand, five hundred sixty-one".