71253901 has 2 divisors, whose sum is σ = 71253902. Its totient is φ = 71253900.

The previous prime is 71253893. The next prime is 71253929. The reversal of 71253901 is 10935217.

It is an a-pointer prime, because the next prime (71253929) can be obtained adding 71253901 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45549001 + 25704900 = 6749^2 + 5070^2 .

It is a cyclic number.

It is not a de Polignac number, because 71253901 - 2³ = 71253893 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71253901.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71254901) 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 as a sum of consecutive naturals, namely, 35626950 + 35626951.

It is an arithmetic number, because the mean of its divisors is an integer number (35626951).

Almost surely, 2^71253901 is an apocalyptic number.

It is an amenable number.

71253901 is a deficient number, since it is larger than the sum of its proper divisors (1).

71253901 is an equidigital number, since it uses as much as digits as its factorization.

71253901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 71253901 is about 8441.2025802015. The cubic root of 71253901 is about 414.5747829273.

It can be divided in two parts, 7125 and 3901, that added together give a triangular number (11026 = T₁₄₈).

The spelling of 71253901 in words is "seventy-one million, two hundred fifty-three thousand, nine hundred one".