7545121 has 4 divisors (see below), whose sum is σ = 7788544. Its totient is φ = 7301700.

The previous prime is 7545119. The next prime is 7545137. The reversal of 7545121 is 1215457.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7545121 - 2¹ = 7545119 is a prime.

It is a Duffinian number.

7545121 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (7545221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121665 + ... + 121726.

It is an arithmetic number, because the mean of its divisors is an integer number (1947136).

Almost surely, 2^7545121 is an apocalyptic number.

It is an amenable number.

7545121 is a deficient number, since it is larger than the sum of its proper divisors (243423).

7545121 is a wasteful number, since it uses less digits than its factorization.

7545121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243422.

The product of its digits is 1400, while the sum is 25.

The square root of 7545121 is about 2746.8383643746. The cubic root of 7545121 is about 196.1351369176.

The spelling of 7545121 in words is "seven million, five hundred forty-five thousand, one hundred twenty-one".