9861457 has 4 divisors (see below), whose sum is σ = 10290240. Its totient is φ = 9432676.

The previous prime is 9861433. The next prime is 9861461. The reversal of 9861457 is 7541689.

9861457 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 7541689 = 19 ⋅396931.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9861457 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9861407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 214357 + ... + 214402.

It is an arithmetic number, because the mean of its divisors is an integer number (2572560).

Almost surely, 2^9861457 is an apocalyptic number.

It is an amenable number.

9861457 is a deficient number, since it is larger than the sum of its proper divisors (428783).

9861457 is a wasteful number, since it uses less digits than its factorization.

9861457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428782.

The product of its digits is 60480, while the sum is 40.

The square root of 9861457 is about 3140.2956867149. The cubic root of 9861457 is about 214.4438990941.

The spelling of 9861457 in words is "nine million, eight hundred sixty-one thousand, four hundred fifty-seven".