71145454 has 4 divisors (see below), whose sum is σ = 106718184. Its totient is φ = 35572726.

The previous prime is 71145449. The next prime is 71145461. The reversal of 71145454 is 45454117.

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

It is a super-2 number, since 2×71145454² = 10123351249732232, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17786362 + ... + 17786365.

It is an arithmetic number, because the mean of its divisors is an integer number (26679546).

Almost surely, 2^71145454 is an apocalyptic number.

71145454 is a deficient number, since it is larger than the sum of its proper divisors (35572730).

71145454 is a wasteful number, since it uses less digits than its factorization.

71145454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35572729.

The product of its digits is 11200, while the sum is 31.

The square root of 71145454 is about 8434.7764641394. The cubic root of 71145454 is about 414.3643513147.

The spelling of 71145454 in words is "seventy-one million, one hundred forty-five thousand, four hundred fifty-four".