7521361 has 8 divisors (see below), whose sum is σ = 8095464. Its totient is φ = 6961920.

The previous prime is 7521347. The next prime is 7521373. The reversal of 7521361 is 1631257.

It can be written as a sum of positive squares in 4 ways, for example, as 921600 + 6599761 = 960^2 + 2569^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a 2-Lehmer number, since φ(7521361) divides (7521361-1)².

It is a cyclic number.

It is not a de Polignac number, because 7521361 - 2⁵ = 7521329 is a prime.

It is a deceptive number, since it divides R_7521360.

It is a Duffinian number.

7521361 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (7521331) 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, 2590 + ... + 4663.

It is an arithmetic number, because the mean of its divisors is an integer number (1011933).

Almost surely, 2^7521361 is an apocalyptic number.

It is an amenable number.

7521361 is a deficient number, since it is larger than the sum of its proper divisors (574103).

7521361 is a wasteful number, since it uses less digits than its factorization.

7521361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7331.

The product of its digits is 1260, while the sum is 25.

The square root of 7521361 is about 2742.5099817503. The cubic root of 7521361 is about 195.9290403271.

The spelling of 7521361 in words is "seven million, five hundred twenty-one thousand, three hundred sixty-one".