7428561 has 16 divisors (see below), whose sum is σ = 11685888. Its totient is φ = 4107600.

The previous prime is 7428539. The next prime is 7428571. The reversal of 7428561 is 1658247.

It is not a de Polignac number, because 7428561 - 2⁵ = 7428529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7428521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5055 + ... + 6356.

It is an arithmetic number, because the mean of its divisors is an integer number (730368).

Almost surely, 2^7428561 is an apocalyptic number.

It is an amenable number.

7428561 is a deficient number, since it is larger than the sum of its proper divisors (4257327).

7428561 is a wasteful number, since it uses less digits than its factorization.

7428561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11452.

The product of its digits is 13440, while the sum is 33.

The square root of 7428561 is about 2725.5386623565. The cubic root of 7428561 is about 195.1198999633.

The spelling of 7428561 in words is "seven million, four hundred twenty-eight thousand, five hundred sixty-one".