71454857 has 4 divisors (see below), whose sum is σ = 71472660. Its totient is φ = 71437056.

The previous prime is 71454853. The next prime is 71454871. The reversal of 71454857 is 75845417.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75845417 = 1117 ⋅67901.

It can be written as a sum of positive squares in 2 ways, for example, as 59969536 + 11485321 = 7744^2 + 3389^2 .

It is a cyclic number.

It is not a de Polignac number, because 71454857 - 2² = 71454853 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71454853) 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, 269 + ... + 11957.

It is an arithmetic number, because the mean of its divisors is an integer number (17868165).

Almost surely, 2^71454857 is an apocalyptic number.

It is an amenable number.

71454857 is a deficient number, since it is larger than the sum of its proper divisors (17803).

71454857 is a wasteful number, since it uses less digits than its factorization.

71454857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17802.

The product of its digits is 156800, while the sum is 41.

The square root of 71454857 is about 8453.0974796225. The cubic root of 71454857 is about 414.9641561920.

The spelling of 71454857 in words is "seventy-one million, four hundred fifty-four thousand, eight hundred fifty-seven".