7443945 has 24 divisors (see below), whose sum is σ = 13206336. Its totient is φ = 3876768.

The previous prime is 7443941. The next prime is 7443949. The reversal of 7443945 is 5493447.

It is an interprime number because it is at equal distance from previous prime (7443941) and next prime (7443949).

It is not a de Polignac number, because 7443945 - 2² = 7443941 is a prime.

It is an Ulam number.

7443945 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (7443941) 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 23 ways as a sum of consecutive naturals, for example, 12 + ... + 3858.

It is an arithmetic number, because the mean of its divisors is an integer number (550264).

Almost surely, 2^7443945 is an apocalyptic number.

It is an amenable number.

7443945 is a deficient number, since it is larger than the sum of its proper divisors (5762391).

7443945 is a wasteful number, since it uses less digits than its factorization.

7443945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3901 (or 3898 counting only the distinct ones).

The product of its digits is 60480, while the sum is 36.

The square root of 7443945 is about 2728.3593971469. The cubic root of 7443945 is about 195.2545000474.

The spelling of 7443945 in words is "seven million, four hundred forty-three thousand, nine hundred forty-five".