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9971725 = 52569701
BaseRepresentation
bin100110000010…
…100000001101
3200202121122011
4212002200031
510023043400
6553421221
7150521041
oct46024015
920677564
109971725
1156a09a5
12340a811
1320b1a3a
141478021
15d1e8ba
hex98280d

9971725 has 12 divisors (see below), whose sum is σ = 12404340. Its totient is φ = 7952000.

The previous prime is 9971711. The next prime is 9971729. The reversal of 9971725 is 5271799.

It can be written as a sum of positive squares in 6 ways, for example, as 149769 + 9821956 = 387^2 + 3134^2 .

It is not a de Polignac number, because 9971725 - 27 = 9971597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9971729) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13875 + ... + 14575.

It is an arithmetic number, because the mean of its divisors is an integer number (1033695).

Almost surely, 29971725 is an apocalyptic number.

It is an amenable number.

9971725 is a deficient number, since it is larger than the sum of its proper divisors (2432615).

9971725 is a wasteful number, since it uses less digits than its factorization.

9971725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1280 (or 1275 counting only the distinct ones).

The product of its digits is 39690, while the sum is 40.

The square root of 9971725 is about 3157.8038254458. The cubic root of 9971725 is about 215.2402218527.

It can be divided in two parts, 99 and 71725, that added together give a square (71824 = 2682).

The spelling of 9971725 in words is "nine million, nine hundred seventy-one thousand, seven hundred twenty-five".

Divisors: 1 5 25 569 701 2845 3505 14225 17525 398869 1994345 9971725