7540537 has 4 divisors (see below), whose sum is σ = 7984116. Its totient is φ = 7096960.

The previous prime is 7540529. The next prime is 7540541. The reversal of 7540537 is 7350457.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6295081 + 1245456 = 2509^2 + 1116^2 .

It is a cyclic number.

It is not a de Polignac number, because 7540537 - 2³ = 7540529 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7540499 and 7540508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7540517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 221764 + ... + 221797.

It is an arithmetic number, because the mean of its divisors is an integer number (1996029).

Almost surely, 2^7540537 is an apocalyptic number.

It is an amenable number.

7540537 is a deficient number, since it is larger than the sum of its proper divisors (443579).

7540537 is a wasteful number, since it uses less digits than its factorization.

7540537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443578.

The product of its (nonzero) digits is 14700, while the sum is 31.

The square root of 7540537 is about 2746.0038237410. The cubic root of 7540537 is about 196.0954085684.

The spelling of 7540537 in words is "seven million, five hundred forty thousand, five hundred thirty-seven".