7275749 has 4 divisors (see below), whose sum is σ = 7835436. Its totient is φ = 6716064.

The previous prime is 7275743. The next prime is 7275757. The reversal of 7275749 is 9475727.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9475727 = 631 ⋅15017.

It can be written as a sum of positive squares in 2 ways, for example, as 4919524 + 2356225 = 2218^2 + 1535^2 .

It is a cyclic number.

It is not a de Polignac number, because 7275749 - 2⁴ = 7275733 is a prime.

It is a super-2 number, since 2×7275749² = 105873047022002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7275743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 279824 + ... + 279849.

It is an arithmetic number, because the mean of its divisors is an integer number (1958859).

Almost surely, 2^7275749 is an apocalyptic number.

It is an amenable number.

7275749 is a deficient number, since it is larger than the sum of its proper divisors (559687).

7275749 is a wasteful number, since it uses less digits than its factorization.

7275749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 559686.

The product of its digits is 123480, while the sum is 41.

The square root of 7275749 is about 2697.3596349023. The cubic root of 7275749 is about 193.7726905094.

The spelling of 7275749 in words is "seven million, two hundred seventy-five thousand, seven hundred forty-nine".