7725706 has 4 divisors (see below), whose sum is σ = 11588562. Its totient is φ = 3862852.

The previous prime is 7725689. The next prime is 7725709. The reversal of 7725706 is 6075277.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6075277 = 13 ⋅467329.

It can be written as a sum of positive squares in only one way, i.e., 6548481 + 1177225 = 2559^2 + 1085^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (7725709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1931425 + ... + 1931428.

Almost surely, 2^7725706 is an apocalyptic number.

7725706 is a deficient number, since it is larger than the sum of its proper divisors (3862856).

7725706 is a wasteful number, since it uses less digits than its factorization.

7725706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3862855.

The product of its (nonzero) digits is 20580, while the sum is 34.

The square root of 7725706 is about 2779.5154253934. The cubic root of 7725706 is about 197.6875833556.

The spelling of 7725706 in words is "seven million, seven hundred twenty-five thousand, seven hundred six".