8457427 has 4 divisors (see below), whose sum is σ = 9226296. Its totient is φ = 7688560.

The previous prime is 8457401. The next prime is 8457443. The reversal of 8457427 is 7247548.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 8457427 - 2¹⁵ = 8424659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8457457) 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, 384418 + ... + 384439.

It is an arithmetic number, because the mean of its divisors is an integer number (2306574).

Almost surely, 2^8457427 is an apocalyptic number.

8457427 is a deficient number, since it is larger than the sum of its proper divisors (768869).

8457427 is a wasteful number, since it uses less digits than its factorization.

8457427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 768868.

The product of its digits is 62720, while the sum is 37.

The square root of 8457427 is about 2908.1655730030. The cubic root of 8457427 is about 203.7414625000.

The spelling of 8457427 in words is "eight million, four hundred fifty-seven thousand, four hundred twenty-seven".