959551 has 4 divisors (see below), whose sum is σ = 961792. Its totient is φ = 957312.

The previous prime is 959533. The next prime is 959561. The reversal of 959551 is 155959.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 155959 = 263 ⋅593.

It is a cyclic number.

It is not a de Polignac number, because 959551 - 2¹⁹ = 435263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (959561) 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, 255 + ... + 1408.

It is an arithmetic number, because the mean of its divisors is an integer number (240448).

2⁹⁵⁹⁵⁵¹ is an apocalyptic number.

959551 is a deficient number, since it is larger than the sum of its proper divisors (2241).

959551 is a wasteful number, since it uses less digits than its factorization.

959551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2240.

The product of its digits is 10125, while the sum is 34.

The square root of 959551 is about 979.5667409626. The cubic root of 959551 is about 98.6331010024.

The spelling of 959551 in words is "nine hundred fifty-nine thousand, five hundred fifty-one".