951521 has 4 divisors (see below), whose sum is σ = 961044. Its totient is φ = 942000.

The previous prime is 951497. The next prime is 951553. The reversal of 951521 is 125159.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 125159 = 257 ⋅487.

It can be written as a sum of positive squares in 2 ways, for example, as 664225 + 287296 = 815^2 + 536^2 .

It is a cyclic number.

It is not a de Polignac number, because 951521 - 2¹⁰ = 950497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (951571) 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, 4610 + ... + 4811.

It is an arithmetic number, because the mean of its divisors is an integer number (240261).

2⁹⁵¹⁵²¹ is an apocalyptic number.

It is an amenable number.

951521 is a deficient number, since it is larger than the sum of its proper divisors (9523).

951521 is a wasteful number, since it uses less digits than its factorization.

951521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9522.

The product of its digits is 450, while the sum is 23.

The square root of 951521 is about 975.4593789595. The cubic root of 951521 is about 98.3571929718.

The spelling of 951521 in words is "nine hundred fifty-one thousand, five hundred twenty-one".