9971405 has 16 divisors (see below), whose sum is σ = 12386304. Its totient is φ = 7701120.

The previous prime is 9971393. The next prime is 9971407. The reversal of 9971405 is 5041799.

It is not a de Polignac number, because 9971405 - 2⁶ = 9971341 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 (9971407) 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 15 ways as a sum of consecutive naturals, for example, 25844 + ... + 26226.

It is an arithmetic number, because the mean of its divisors is an integer number (774144).

Almost surely, 2^9971405 is an apocalyptic number.

It is an amenable number.

9971405 is a deficient number, since it is larger than the sum of its proper divisors (2414899).

9971405 is a wasteful number, since it uses less digits than its factorization.

9971405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556.

The product of its (nonzero) digits is 11340, while the sum is 35.

The square root of 9971405 is about 3157.7531569139. The cubic root of 9971405 is about 215.2379194223.

The spelling of 9971405 in words is "nine million, nine hundred seventy-one thousand, four hundred five".