71253001 has 4 divisors (see below), whose sum is σ = 75444372. Its totient is φ = 67061632.

The previous prime is 71252981. The next prime is 71253019. The reversal of 71253001 is 10035217.

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 19758025 + 51494976 = 4445^2 + 7176^2 .

It is a cyclic number.

It is not a de Polignac number, because 71253001 - 2²⁵ = 37698569 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71253001.

It is not an unprimeable number, because it can be changed into a prime (71253901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2095660 + ... + 2095693.

It is an arithmetic number, because the mean of its divisors is an integer number (18861093).

Almost surely, 2^71253001 is an apocalyptic number.

It is an amenable number.

71253001 is a deficient number, since it is larger than the sum of its proper divisors (4191371).

71253001 is a wasteful number, since it uses less digits than its factorization.

71253001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4191370.

The product of its (nonzero) digits is 210, while the sum is 19.

The square root of 71253001 is about 8441.1492700935. The cubic root of 71253001 is about 414.5730374375.

Adding to 71253001 its reverse (10035217), we get a palindrome (81288218).

The spelling of 71253001 in words is "seventy-one million, two hundred fifty-three thousand, one".