7925749 has 4 divisors (see below), whose sum is σ = 8535436. Its totient is φ = 7316064.

The previous prime is 7925741. The next prime is 7925759. The reversal of 7925749 is 9475297.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9475297 = 13 ⋅728869.

It can be written as a sum of positive squares in 2 ways, for example, as 4334724 + 3591025 = 2082^2 + 1895^2 .

It is a cyclic number.

It is not a de Polignac number, because 7925749 - 2³ = 7925741 is a prime.

It is a super-2 number, since 2×7925749² = 125634994422002, which contains 22 as substring.

It is a d-powerful number, because it can be written as 7⁷ + 9² + 2¹⁷ + 5⁹ + 7⁷ + 4¹¹ + 9² .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7925741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 304824 + ... + 304849.

It is an arithmetic number, because the mean of its divisors is an integer number (2133859).

Almost surely, 2^7925749 is an apocalyptic number.

It is an amenable number.

7925749 is a deficient number, since it is larger than the sum of its proper divisors (609687).

7925749 is a wasteful number, since it uses less digits than its factorization.

7925749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 609686.

The product of its digits is 158760, while the sum is 43.

The square root of 7925749 is about 2815.2706797038. The cubic root of 7925749 is about 199.3793174250.

The spelling of 7925749 in words is "seven million, nine hundred twenty-five thousand, seven hundred forty-nine".