7764121 has 8 divisors (see below), whose sum is σ = 8276040. Its totient is φ = 7258368.

The previous prime is 7764101. The next prime is 7764131. The reversal of 7764121 is 1214677.

It can be written as a sum of positive squares in 4 ways, for example, as 2768896 + 4995225 = 1664^2 + 2235^2 .

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 7764121 - 2⁷ = 7763993 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7764121.

It is not an unprimeable number, because it can be changed into a prime (7764101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1215 + ... + 4123.

It is an arithmetic number, because the mean of its divisors is an integer number (1034505).

Almost surely, 2^7764121 is an apocalyptic number.

It is an amenable number.

7764121 is a deficient number, since it is larger than the sum of its proper divisors (511919).

7764121 is a wasteful number, since it uses less digits than its factorization.

7764121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3083.

The product of its digits is 2352, while the sum is 28.

The square root of 7764121 is about 2786.4172336533. The cubic root of 7764121 is about 198.0146997895.

Adding to 7764121 its reverse (1214677), we get a palindrome (8978798).

The spelling of 7764121 in words is "seven million, seven hundred sixty-four thousand, one hundred twenty-one".