71378541 has 48 divisors (see below), whose sum is σ = 116516400. Its totient is φ = 41803776.

The previous prime is 71378537. The next prime is 71378551. The reversal of 71378541 is 14587317.

It can be written as a sum of positive squares in 8 ways, for example, as 3316041 + 68062500 = 1821^2 + 8250^2 .

It is not a de Polignac number, because 71378541 - 2² = 71378537 is a prime.

It is a super-2 number, since 2×71378541² = 10189792230577362, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 71378496 and 71378505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71378521) 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 47 ways as a sum of consecutive naturals, for example, 369741 + ... + 369933.

It is an arithmetic number, because the mean of its divisors is an integer number (2427425).

Almost surely, 2^71378541 is an apocalyptic number.

It is an amenable number.

71378541 is a deficient number, since it is larger than the sum of its proper divisors (45137859).

71378541 is a wasteful number, since it uses less digits than its factorization.

71378541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350 (or 347 counting only the distinct ones).

The product of its digits is 23520, while the sum is 36.

The square root of 71378541 is about 8448.5821887462. The cubic root of 71378541 is about 414.8163720438.

The spelling of 71378541 in words is "seventy-one million, three hundred seventy-eight thousand, five hundred forty-one".