9971255 has 12 divisors (see below), whose sum is σ = 13919400. Its totient is φ = 6837264.

The previous prime is 9971251. The next prime is 9971281. The reversal of 9971255 is 5521799.

It is not a de Polignac number, because 9971255 - 2² = 9971251 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9971251) 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 11 ways as a sum of consecutive naturals, for example, 20105 + ... + 20594.

It is an arithmetic number, because the mean of its divisors is an integer number (1159950).

Almost surely, 2^9971255 is an apocalyptic number.

9971255 is a deficient number, since it is larger than the sum of its proper divisors (3948145).

9971255 is a wasteful number, since it uses less digits than its factorization.

9971255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40718 (or 40711 counting only the distinct ones).

The product of its digits is 28350, while the sum is 38.

The square root of 9971255 is about 3157.7294057598. The cubic root of 9971255 is about 215.2368401411.

The spelling of 9971255 in words is "nine million, nine hundred seventy-one thousand, two hundred fifty-five".