71421607 has 4 divisors (see below), whose sum is σ = 75622896. Its totient is φ = 67220320.

The previous prime is 71421599. The next prime is 71421611. The reversal of 71421607 is 70612417.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 71421607 - 2³ = 71421599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71421307) 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, 2100619 + ... + 2100652.

It is an arithmetic number, because the mean of its divisors is an integer number (18905724).

Almost surely, 2^71421607 is an apocalyptic number.

71421607 is a deficient number, since it is larger than the sum of its proper divisors (4201289).

71421607 is a wasteful number, since it uses less digits than its factorization.

71421607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4201288.

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 71421607 is about 8451.1305160907. The cubic root of 71421607 is about 414.8997812871.

The spelling of 71421607 in words is "seventy-one million, four hundred twenty-one thousand, six hundred seven".