71371253 has 4 divisors (see below), whose sum is σ = 75569580. Its totient is φ = 67172928.

The previous prime is 71371249. The next prime is 71371309. The reversal of 71371253 is 35217317.

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

It can be written as a sum of positive squares in 2 ways, for example, as 65577604 + 5793649 = 8098^2 + 2407^2 .

It is a cyclic number.

It is not a de Polignac number, because 71371253 - 2² = 71371249 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 (71371243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2099138 + ... + 2099171.

It is an arithmetic number, because the mean of its divisors is an integer number (18892395).

Almost surely, 2^71371253 is an apocalyptic number.

It is an amenable number.

71371253 is a deficient number, since it is larger than the sum of its proper divisors (4198327).

71371253 is a wasteful number, since it uses less digits than its factorization.

71371253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4198326.

The product of its digits is 4410, while the sum is 29.

The square root of 71371253 is about 8448.1508627628. The cubic root of 71371253 is about 414.8022534933.

It can be divided in two parts, 7 and 1371253, that multiplied together give a triangular number (9598771 = T₄₃₈₁).

The spelling of 71371253 in words is "seventy-one million, three hundred seventy-one thousand, two hundred fifty-three".