8391045 has 32 divisors (see below), whose sum is σ = 14861952. Its totient is φ = 4015872.

The previous prime is 8391037. The next prime is 8391073. The reversal of 8391045 is 5401938.

It is not a de Polignac number, because 8391045 - 2³ = 8391037 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6634 + ... + 7796.

It is an arithmetic number, because the mean of its divisors is an integer number (464436).

Almost surely, 2^8391045 is an apocalyptic number.

It is an amenable number.

8391045 is a deficient number, since it is larger than the sum of its proper divisors (6470907).

8391045 is a wasteful number, since it uses less digits than its factorization.

8391045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1221.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 8391045 is about 2896.7300530080. The cubic root of 8391045 is about 203.2070089368.

The spelling of 8391045 in words is "eight million, three hundred ninety-one thousand, forty-five".