71054591 has 4 divisors (see below), whose sum is σ = 71071992. Its totient is φ = 71037192.

The previous prime is 71054579. The next prime is 71054597. The reversal of 71054591 is 19545017.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19545017 = 461 ⋅42397.

It is a cyclic number.

It is not a de Polignac number, because 71054591 - 2²⁶ = 3945727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71054597) 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, 1121 + ... + 11973.

It is an arithmetic number, because the mean of its divisors is an integer number (17767998).

Almost surely, 2^71054591 is an apocalyptic number.

71054591 is a deficient number, since it is larger than the sum of its proper divisors (17401).

71054591 is a wasteful number, since it uses less digits than its factorization.

71054591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17400.

The product of its (nonzero) digits is 6300, while the sum is 32.

The square root of 71054591 is about 8429.3885306112. The cubic root of 71054591 is about 414.1878751632.

It can be divided in two parts, 710 and 54591, that multiplied together give a triangular number (38759610 = T₈₈₀₄).

The spelling of 71054591 in words is "seventy-one million, fifty-four thousand, five hundred ninety-one".