7645121 has 8 divisors (see below), whose sum is σ = 8830944. Its totient is φ = 6541120.

The previous prime is 7645117. The next prime is 7645159. The reversal of 7645121 is 1215467.

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 7645121 - 2² = 7645117 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7645171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20255 + ... + 20628.

It is an arithmetic number, because the mean of its divisors is an integer number (1103868).

Almost surely, 2^7645121 is an apocalyptic number.

It is an amenable number.

7645121 is a deficient number, since it is larger than the sum of its proper divisors (1185823).

7645121 is a wasteful number, since it uses less digits than its factorization.

7645121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40911.

The product of its digits is 1680, while the sum is 26.

The square root of 7645121 is about 2764.9811934261. The cubic root of 7645121 is about 196.9978355298.

It can be divided in two parts, 764 and 5121, that added together give a palindrome (5885).

The spelling of 7645121 in words is "seven million, six hundred forty-five thousand, one hundred twenty-one".