8612121 has 16 divisors (see below), whose sum is σ = 13169024. Its totient is φ = 4904064.

The previous prime is 8612119. The next prime is 8612167. The reversal of 8612121 is 1212168.

It is not a de Polignac number, because 8612121 - 2¹ = 8612119 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

8612121 is a modest number, since divided by 2121 gives 861 as remainder.

It is not an unprimeable number, because it can be changed into a prime (8612221) 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, 7821 + ... + 8853.

It is an arithmetic number, because the mean of its divisors is an integer number (823064).

Almost surely, 2^8612121 is an apocalyptic number.

It is an amenable number.

8612121 is a deficient number, since it is larger than the sum of its proper divisors (4556903).

8612121 is a wasteful number, since it uses less digits than its factorization.

8612121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1440.

The product of its digits is 192, while the sum is 21.

The square root of 8612121 is about 2934.6415454021. The cubic root of 8612121 is about 204.9761701430.

Adding to 8612121 its reverse (1212168), we get a palindrome (9824289).

The spelling of 8612121 in words is "eight million, six hundred twelve thousand, one hundred twenty-one".