71406381 has 8 divisors (see below), whose sum is σ = 98491680. Its totient is φ = 45962672.

The previous prime is 71406373. The next prime is 71406407. The reversal of 71406381 is 18360417.

It is a happy number.

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 71406381 - 2³ = 71406373 is a prime.

It is a super-2 number, since 2×71406381² = 10197742495034322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71406331) 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 7 ways as a sum of consecutive naturals, for example, 410295 + ... + 410468.

It is an arithmetic number, because the mean of its divisors is an integer number (12311460).

Almost surely, 2^71406381 is an apocalyptic number.

It is an amenable number.

71406381 is a deficient number, since it is larger than the sum of its proper divisors (27085299).

71406381 is a wasteful number, since it uses less digits than its factorization.

71406381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 820795.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 71406381 is about 8450.2296418500. The cubic root of 71406381 is about 414.8702957513.

Adding to 71406381 its reverse (18360417), we get a palindrome (89766798).

The spelling of 71406381 in words is "seventy-one million, four hundred six thousand, three hundred eighty-one".