9725429 has 4 divisors (see below), whose sum is σ = 11114784. Its totient is φ = 8336076.

The previous prime is 9725407. The next prime is 9725431. The reversal of 9725429 is 9245279.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9245279 = 193 ⋅47903.

It is a de Polignac number, because none of the positive numbers 2^k-9725429 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 9725392 and 9725401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9725449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 694667 + ... + 694680.

It is an arithmetic number, because the mean of its divisors is an integer number (2778696).

Almost surely, 2^9725429 is an apocalyptic number.

It is an amenable number.

9725429 is a deficient number, since it is larger than the sum of its proper divisors (1389355).

9725429 is a wasteful number, since it uses less digits than its factorization.

9725429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1389354.

The product of its digits is 45360, while the sum is 38.

The square root of 9725429 is about 3118.5620083622. The cubic root of 9725429 is about 213.4533241535.

The spelling of 9725429 in words is "nine million, seven hundred twenty-five thousand, four hundred twenty-nine".