71151421 has 8 divisors (see below), whose sum is σ = 78683904. Its totient is φ = 63796320.

The previous prime is 71151403. The next prime is 71151427. The reversal of 71151421 is 12415117.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71151421 - 2⁵ = 71151389 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71151392 and 71151401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71151427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43501 + ... + 45106.

It is an arithmetic number, because the mean of its divisors is an integer number (9835488).

Almost surely, 2^71151421 is an apocalyptic number.

It is an amenable number.

71151421 is a deficient number, since it is larger than the sum of its proper divisors (7532483).

71151421 is a wasteful number, since it uses less digits than its factorization.

71151421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88691.

The product of its digits is 280, while the sum is 22.

The square root of 71151421 is about 8435.1301708984. The cubic root of 71151421 is about 414.3759352966.

Adding to 71151421 its reverse (12415117), we get a palindrome (83566538).

The spelling of 71151421 in words is "seventy-one million, one hundred fifty-one thousand, four hundred twenty-one".