8457149 has 4 divisors (see below), whose sum is σ = 8470080. Its totient is φ = 8444220.

The previous prime is 8457131. The next prime is 8457151. The reversal of 8457149 is 9417548.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8457149 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8457179) 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, 5429 + ... + 6810.

It is an arithmetic number, because the mean of its divisors is an integer number (2117520).

Almost surely, 2^8457149 is an apocalyptic number.

It is an amenable number.

8457149 is a deficient number, since it is larger than the sum of its proper divisors (12931).

8457149 is a wasteful number, since it uses less digits than its factorization.

8457149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12930.

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

The square root of 8457149 is about 2908.1177761569. The cubic root of 8457149 is about 203.7392301131.

The spelling of 8457149 in words is "eight million, four hundred fifty-seven thousand, one hundred forty-nine".