7725731 has 4 divisors (see below), whose sum is σ = 8320032. Its totient is φ = 7131432.

The previous prime is 7725713. The next prime is 7725733. The reversal of 7725731 is 1375277.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1375277 = 19 ⋅72383.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7725731 is a prime.

It is a super-2 number, since 2×7725731² = 119373838968722, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 7.

It is not an unprimeable number, because it can be changed into a prime (7725733) 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, 297131 + ... + 297156.

It is an arithmetic number, because the mean of its divisors is an integer number (2080008).

Almost surely, 2^7725731 is an apocalyptic number.

7725731 is a deficient number, since it is larger than the sum of its proper divisors (594301).

7725731 is a wasteful number, since it uses less digits than its factorization.

7725731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 594300.

The product of its digits is 10290, while the sum is 32.

The square root of 7725731 is about 2779.5199225766. The cubic root of 7725731 is about 197.6877965911.

The spelling of 7725731 in words is "seven million, seven hundred twenty-five thousand, seven hundred thirty-one".