7136521 has 4 divisors (see below), whose sum is σ = 8156032. Its totient is φ = 6117012.

The previous prime is 7136497. The next prime is 7136537. The reversal of 7136521 is 1256317.

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 7136521 - 2⁵ = 7136489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7136021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 509745 + ... + 509758.

It is an arithmetic number, because the mean of its divisors is an integer number (2039008).

Almost surely, 2^7136521 is an apocalyptic number.

It is an amenable number.

7136521 is a deficient number, since it is larger than the sum of its proper divisors (1019511).

7136521 is a wasteful number, since it uses less digits than its factorization.

7136521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1019510.

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

The square root of 7136521 is about 2671.4267723447. The cubic root of 7136521 is about 192.5287166919.

The spelling of 7136521 in words is "seven million, one hundred thirty-six thousand, five hundred twenty-one".