71852257 has 4 divisors (see below), whose sum is σ = 71875476. Its totient is φ = 71829040.

The previous prime is 71852233. The next prime is 71852267. The reversal of 71852257 is 75225817.

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 37933281 + 33918976 = 6159^2 + 5824^2 .

It is a cyclic number.

It is not a de Polignac number, because 71852257 - 2¹⁹ = 71327969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71852267) 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, 6094 + ... + 13447.

It is an arithmetic number, because the mean of its divisors is an integer number (17968869).

Almost surely, 2^71852257 is an apocalyptic number.

It is an amenable number.

71852257 is a deficient number, since it is larger than the sum of its proper divisors (23219).

71852257 is a wasteful number, since it uses less digits than its factorization.

71852257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23218.

The product of its digits is 39200, while the sum is 37.

The square root of 71852257 is about 8476.5710638206. The cubic root of 71852257 is about 415.7320162139.

It can be divided in two parts, 718 and 52257, that added together give a triangular number (52975 = T₃₂₅).

The spelling of 71852257 in words is "seventy-one million, eight hundred fifty-two thousand, two hundred fifty-seven".