71400641 has 12 divisors (see below), whose sum is σ = 77650560. Its totient is φ = 65622960.

The previous prime is 71400631. The next prime is 71400677. The reversal of 71400641 is 14600417.

It is not a de Polignac number, because 71400641 - 2⁶ = 71400577 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71400611) 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 11 ways as a sum of consecutive naturals, for example, 45020 + ... + 46578.

It is an arithmetic number, because the mean of its divisors is an integer number (6470880).

Almost surely, 2^71400641 is an apocalyptic number.

It is an amenable number.

71400641 is a deficient number, since it is larger than the sum of its proper divisors (6249919).

71400641 is a wasteful number, since it uses less digits than its factorization.

71400641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1856 (or 1843 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 71400641 is about 8449.8899992840. The cubic root of 71400641 is about 414.8591790076.

The spelling of 71400641 in words is "seventy-one million, four hundred thousand, six hundred forty-one".