7672121 has 4 divisors (see below), whose sum is σ = 7816932. Its totient is φ = 7527312.

The previous prime is 7672111. The next prime is 7672123. The reversal of 7672121 is 1212767.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5112121 + 2560000 = 2261^2 + 1600^2 .

It is a cyclic number.

It is not a de Polignac number, because 7672121 - 2⁶ = 7672057 is a prime.

It is a super-2 number, since 2×7672121² = 117722881277282, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7672123) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 72326 + ... + 72431.

It is an arithmetic number, because the mean of its divisors is an integer number (1954233).

Almost surely, 2^7672121 is an apocalyptic number.

It is an amenable number.

7672121 is a deficient number, since it is larger than the sum of its proper divisors (144811).

7672121 is a wasteful number, since it uses less digits than its factorization.

7672121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144810.

The product of its digits is 1176, while the sum is 26.

The square root of 7672121 is about 2769.8593827124. The cubic root of 7672121 is about 197.2294731213.

Adding to 7672121 its reverse (1212767), we get a palindrome (8884888).

The spelling of 7672121 in words is "seven million, six hundred seventy-two thousand, one hundred twenty-one".