7409681 has 4 divisors (see below), whose sum is σ = 7425264. Its totient is φ = 7394100.

The previous prime is 7409669. The next prime is 7409737. The reversal of 7409681 is 1869047.

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: 1869047 = 293 ⋅6379.

It is a cyclic number.

It is not a de Polignac number, because 7409681 - 2⁶ = 7409617 is a prime.

It is a super-2 number, since 2×7409681² = 109806745043522, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (7439681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7055 + ... + 8036.

It is an arithmetic number, because the mean of its divisors is an integer number (1856316).

Almost surely, 2^7409681 is an apocalyptic number.

It is an amenable number.

7409681 is a deficient number, since it is larger than the sum of its proper divisors (15583).

7409681 is a wasteful number, since it uses less digits than its factorization.

7409681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15582.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 7409681 is about 2722.0729233435. The cubic root of 7409681 is about 194.9544579159.

The spelling of 7409681 in words is "seven million, four hundred nine thousand, six hundred eighty-one".