30866121 has 48 divisors (see below), whose sum is σ = 54250560. Its totient is φ = 16652160.

The previous prime is 30866093. The next prime is 30866149. The reversal of 30866121 is 12166803.

It is an interprime number because it is at equal distance from previous prime (30866093) and next prime (30866149).

It is not a de Polignac number, because 30866121 - 2⁶ = 30866057 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30866191) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 36910 + ... + 37736.

It is an arithmetic number, because the mean of its divisors is an integer number (1130220).

Almost surely, 2^30866121 is an apocalyptic number.

It is an amenable number.

30866121 is a deficient number, since it is larger than the sum of its proper divisors (23384439).

30866121 is a wasteful number, since it uses less digits than its factorization.

With its successor (30866122) it forms a Ruth-Aaron pair, since the sum of their prime factors is the same (886).

30866121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 886 (or 883 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 30866121 is about 5555.7286650808. The cubic root of 30866121 is about 313.6851923518.

The spelling of 30866121 in words is "thirty million, eight hundred sixty-six thousand, one hundred twenty-one".