71421801 has 16 divisors (see below), whose sum is σ = 105649920. Its totient is φ = 42551120.

The previous prime is 71421797. The next prime is 71421821. The reversal of 71421801 is 10812417.

It is a cyclic number.

It is not a de Polignac number, because 71421801 - 2² = 71421797 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71421821) 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 15 ways as a sum of consecutive naturals, for example, 16395 + ... + 20288.

It is an arithmetic number, because the mean of its divisors is an integer number (6603120).

Almost surely, 2^71421801 is an apocalyptic number.

It is an amenable number.

71421801 is a deficient number, since it is larger than the sum of its proper divisors (34228119).

71421801 is a wasteful number, since it uses less digits than its factorization.

71421801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36756.

The product of its (nonzero) digits is 448, while the sum is 24.

The square root of 71421801 is about 8451.1419938373. The cubic root of 71421801 is about 414.9001569459.

The spelling of 71421801 in words is "seventy-one million, four hundred twenty-one thousand, eight hundred one".