7149845 has 4 divisors (see below), whose sum is σ = 8579820. Its totient is φ = 5719872.

The previous prime is 7149841. The next prime is 7149851. The reversal of 7149845 is 5489417.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5489417 = 1049 ⋅5233.

It can be written as a sum of positive squares in 2 ways, for example, as 1456849 + 5692996 = 1207^2 + 2386^2 .

It is a cyclic number.

It is not a de Polignac number, because 7149845 - 2² = 7149841 is a prime.

It is a super-2 number, since 2×7149845² = 102240567048050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7149799 and 7149808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7149841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 714980 + ... + 714989.

It is an arithmetic number, because the mean of its divisors is an integer number (2144955).

Almost surely, 2^7149845 is an apocalyptic number.

It is an amenable number.

7149845 is a deficient number, since it is larger than the sum of its proper divisors (1429975).

7149845 is a wasteful number, since it uses less digits than its factorization.

7149845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1429974.

The product of its digits is 40320, while the sum is 38.

The square root of 7149845 is about 2673.9194079104. The cubic root of 7149845 is about 192.6484602765.

The spelling of 7149845 in words is "seven million, one hundred forty-nine thousand, eight hundred forty-five".