7575121 has 4 divisors (see below), whose sum is σ = 7779892. Its totient is φ = 7370352.

The previous prime is 7575109. The next prime is 7575133. The reversal of 7575121 is 1215757.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1215757 = 23 ⋅52859.

It is an interprime number because it is at equal distance from previous prime (7575109) and next prime (7575133).

It can be written as a sum of positive squares in 2 ways, for example, as 3474496 + 4100625 = 1864^2 + 2025^2 .

It is a cyclic number.

It is not a de Polignac number, because 7575121 - 2⁷ = 7574993 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 7575121.

It is not an unprimeable number, because it can be changed into a prime (7578121) 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, 102330 + ... + 102403.

It is an arithmetic number, because the mean of its divisors is an integer number (1944973).

Almost surely, 2^7575121 is an apocalyptic number.

It is an amenable number.

7575121 is a deficient number, since it is larger than the sum of its proper divisors (204771).

7575121 is a wasteful number, since it uses less digits than its factorization.

7575121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204770.

The product of its digits is 2450, while the sum is 28.

The square root of 7575121 is about 2752.2937706575. The cubic root of 7575121 is about 196.3947427742.

It can be divided in two parts, 7 and 575121, that added together give a triangular number (575128 = T₁₀₇₂).

The spelling of 7575121 in words is "seven million, five hundred seventy-five thousand, one hundred twenty-one".