7018561 has 4 divisors (see below), whose sum is σ = 7656624. Its totient is φ = 6380500.

The previous prime is 7018553. The next prime is 7018573. The reversal of 7018561 is 1658107.

It is a happy number.

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 7018561 - 2³ = 7018553 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7018511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 319015 + ... + 319036.

It is an arithmetic number, because the mean of its divisors is an integer number (1914156).

Almost surely, 2^7018561 is an apocalyptic number.

It is an amenable number.

7018561 is a deficient number, since it is larger than the sum of its proper divisors (638063).

7018561 is a wasteful number, since it uses less digits than its factorization.

7018561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638062.

The product of its (nonzero) digits is 1680, while the sum is 28.

The square root of 7018561 is about 2649.2566882052. The cubic root of 7018561 is about 191.4620448471.

The spelling of 7018561 in words is "seven million, eighteen thousand, five hundred sixty-one".