971550 has 72 divisors (see below), whose sum is σ = 2785536. Its totient is φ = 241920.

The previous prime is 971549. The next prime is 971561. The reversal of 971550 is 55179.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 7587 + ... + 7713.

It is an arithmetic number, because the mean of its divisors is an integer number (38688).

2⁹⁷¹⁵⁵⁰ is an apocalyptic number.

971550 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 971550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1392768).

971550 is an abundant number, since it is smaller than the sum of its proper divisors (1813986).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

971550 is a wasteful number, since it uses less digits than its factorization.

971550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162 (or 154 counting only the distinct ones).

The product of its (nonzero) digits is 1575, while the sum is 27.

The square root of 971550 is about 985.6723593568. The cubic root of 971550 is about 99.0425284069.

It can be divided in two parts, 971 and 550, that added together give a square (1521 = 39²).

The spelling of 971550 in words is "nine hundred seventy-one thousand, five hundred fifty".