7028561 has 4 divisors (see below), whose sum is σ = 7084032. Its totient is φ = 6973092.

The previous prime is 7028533. The next prime is 7028563. The reversal of 7028561 is 1658207.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1658207 = 47 ⋅35281.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7028561 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7028563) 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, 27545 + ... + 27798.

It is an arithmetic number, because the mean of its divisors is an integer number (1771008).

Almost surely, 2^7028561 is an apocalyptic number.

It is an amenable number.

7028561 is a deficient number, since it is larger than the sum of its proper divisors (55471).

7028561 is a wasteful number, since it uses less digits than its factorization.

7028561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55470.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 7028561 is about 2651.1433382599. The cubic root of 7028561 is about 191.5529329867.

The spelling of 7028561 in words is "seven million, twenty-eight thousand, five hundred sixty-one".