7124749 has 4 divisors (see below), whose sum is σ = 7370460. Its totient is φ = 6879040.

The previous prime is 7124743. The next prime is 7124759. The reversal of 7124749 is 9474217.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9474217 = 19 ⋅498643.

It can be written as a sum of positive squares in 2 ways, for example, as 2205225 + 4919524 = 1485^2 + 2218^2 .

It is a cyclic number.

It is not a de Polignac number, because 7124749 - 2¹⁷ = 6993677 is a prime.

It is an Ulam number.

It is a Duffinian number.

7124749 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7124743) 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, 122812 + ... + 122869.

It is an arithmetic number, because the mean of its divisors is an integer number (1842615).

Almost surely, 2^7124749 is an apocalyptic number.

It is an amenable number.

7124749 is a deficient number, since it is larger than the sum of its proper divisors (245711).

7124749 is a wasteful number, since it uses less digits than its factorization.

7124749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245710.

The product of its digits is 14112, while the sum is 34.

The square root of 7124749 is about 2669.2225459860. Note that the first 3 decimals coincide. The cubic root of 7124749 is about 192.4227969495.

The spelling of 7124749 in words is "seven million, one hundred twenty-four thousand, seven hundred forty-nine".