7523121 has 4 divisors (see below), whose sum is σ = 10030832. Its totient is φ = 5015412.

The previous prime is 7523101. The next prime is 7523137. The reversal of 7523121 is 1213257.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1213257 = 3 ⋅404419.

It is not a de Polignac number, because 7523121 - 2⁹ = 7522609 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7523101) 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, 1253851 + ... + 1253856.

It is an arithmetic number, because the mean of its divisors is an integer number (2507708).

Almost surely, 2^7523121 is an apocalyptic number.

It is an amenable number.

7523121 is a deficient number, since it is larger than the sum of its proper divisors (2507711).

7523121 is a wasteful number, since it uses less digits than its factorization.

7523121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2507710.

The product of its digits is 420, while the sum is 21.

The square root of 7523121 is about 2742.8308369274. The cubic root of 7523121 is about 195.9443216136.

Adding to 7523121 its reverse (1213257), we get a palindrome (8736378).

The spelling of 7523121 in words is "seven million, five hundred twenty-three thousand, one hundred twenty-one".