7120645 has 16 divisors (see below), whose sum is σ = 9809280. Its totient is φ = 4860864.

The previous prime is 7120621. The next prime is 7120657. The reversal of 7120645 is 5460217.

It is a cyclic number.

It is not a de Polignac number, because 7120645 - 2¹⁷ = 6989573 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 13354 + ... + 13876.

It is an arithmetic number, because the mean of its divisors is an integer number (613080).

Almost surely, 2^7120645 is an apocalyptic number.

It is an amenable number.

7120645 is a deficient number, since it is larger than the sum of its proper divisors (2688635).

7120645 is a wasteful number, since it uses less digits than its factorization.

7120645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 924.

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

The square root of 7120645 is about 2668.4536720730. The cubic root of 7120645 is about 192.3858433747.

The spelling of 7120645 in words is "seven million, one hundred twenty thousand, six hundred forty-five".