7157945 has 16 divisors (see below), whose sum is σ = 9106560. Its totient is φ = 5389824.

The previous prime is 7157933. The next prime is 7157963. The reversal of 7157945 is 5497517.

It is a cyclic number.

It is not a de Polignac number, because 7157945 - 2⁶ = 7157881 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 7157899 and 7157908.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 7241 + ... + 8169.

It is an arithmetic number, because the mean of its divisors is an integer number (569160).

Almost surely, 2^7157945 is an apocalyptic number.

It is an amenable number.

7157945 is a deficient number, since it is larger than the sum of its proper divisors (1948615).

7157945 is a wasteful number, since it uses less digits than its factorization.

7157945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1024.

The product of its digits is 44100, while the sum is 38.

The square root of 7157945 is about 2675.4336097164. The cubic root of 7157945 is about 192.7211827679.

The spelling of 7157945 in words is "seven million, one hundred fifty-seven thousand, nine hundred forty-five".