7121885 has 8 divisors (see below), whose sum is σ = 8570880. Its totient is φ = 5681104.

The previous prime is 7121879. The next prime is 7121921. The reversal of 7121885 is 5881217.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7121885 - 2⁸ = 7121629 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56 + ... + 3774.

It is an arithmetic number, because the mean of its divisors is an integer number (1071360).

Almost surely, 2^7121885 is an apocalyptic number.

It is an amenable number.

7121885 is a deficient number, since it is larger than the sum of its proper divisors (1448995).

7121885 is a wasteful number, since it uses less digits than its factorization.

7121885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4107.

The product of its digits is 4480, while the sum is 32.

The square root of 7121885 is about 2668.6860062585. The cubic root of 7121885 is about 192.3970101814.

The spelling of 7121885 in words is "seven million, one hundred twenty-one thousand, eight hundred eighty-five".