71154391 has 8 divisors (see below), whose sum is σ = 88712064. Its totient is φ = 55444920.

The previous prime is 71154389. The next prime is 71154409. The reversal of 71154391 is 19345117.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71154391 - 2¹ = 71154389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71154301) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 461965 + ... + 462118.

It is an arithmetic number, because the mean of its divisors is an integer number (11089008).

Almost surely, 2^71154391 is an apocalyptic number.

71154391 is a deficient number, since it is larger than the sum of its proper divisors (17557673).

71154391 is a wasteful number, since it uses less digits than its factorization.

71154391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 924101.

The product of its digits is 3780, while the sum is 31.

The square root of 71154391 is about 8435.3062185080. The cubic root of 71154391 is about 414.3817008381.

The spelling of 71154391 in words is "seventy-one million, one hundred fifty-four thousand, three hundred ninety-one".