71001801 has 18 divisors (see below), whose sum is σ = 111056478. Its totient is φ = 43692480.

The previous prime is 71001787. The next prime is 71001829. The reversal of 71001801 is 10810017.

It can be written as a sum of positive squares in 3 ways, for example, as 9363600 + 61638201 = 3060^2 + 7851^2 .

It is not a de Polignac number, because 71001801 - 2²⁵ = 37447369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71001871) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 21820 + ... + 24861.

Almost surely, 2^71001801 is an apocalyptic number.

It is an amenable number.

71001801 is a deficient number, since it is larger than the sum of its proper divisors (40054677).

71001801 is a wasteful number, since it uses less digits than its factorization.

71001801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46713 (or 46697 counting only the distinct ones).

The product of its (nonzero) digits is 56, while the sum is 18.

The square root of 71001801 is about 8426.2566421870. The cubic root of 71001801 is about 414.0852761393.

Adding to 71001801 its reverse (10810017), we get a palindrome (81811818).

The spelling of 71001801 in words is "seventy-one million, one thousand, eight hundred one".