7257945 has 8 divisors (see below), whose sum is σ = 11612736. Its totient is φ = 3870896.

The previous prime is 7257941. The next prime is 7257947. The reversal of 7257945 is 5497527.

7257945 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7257945 - 2² = 7257941 is a prime.

7257945 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (7257941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 241917 + ... + 241946.

It is an arithmetic number, because the mean of its divisors is an integer number (1451592).

Almost surely, 2^7257945 is an apocalyptic number.

It is an amenable number.

7257945 is a deficient number, since it is larger than the sum of its proper divisors (4354791).

7257945 is a wasteful number, since it uses less digits than its factorization.

7257945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483871.

The product of its digits is 88200, while the sum is 39.

The square root of 7257945 is about 2694.0573490555. The cubic root of 7257945 is about 193.6145053363.

The spelling of 7257945 in words is "seven million, two hundred fifty-seven thousand, nine hundred forty-five".